North Korea’s recent underwater launch of strategic cruise missiles underscores its accelerating drive to field a survivable, sea-based nuclear deterrent, even as significant engineering hurdles and platform limitations continue to constrain its naval ambitions. North Korea test-fired two types of submarine-launched strategic cruise missiles into the Sea of Japan, marking its first public underwater cruise […]
North Korea says it has test-fired two types of submarine-launched strategic cruise missiles off its east coast, in what appears to be the first time its bizarre Hero Kim Kun Ok submarine has been seen at sea in a publicized manner. If the vessel truly was the launch platform, the tests would mark its first confirmed weapons trials and a potential step toward operational service. Unveiled with considerable fanfare in 2023, the Hero Kim Kun Ok has been billed by Pyongyang as a centerpiece of its future nuclear-armed navy, but its operational status and actual capabilities have remained unclear.
The launches took place Wednesday, October 14, with state media Korean Central News Agency (KCNA) reporting the activity earlier today. North Korea said the tests were intended to assess the readiness of its underwater combat systems, improve the Navy’s ability to execute strategic missions, and demonstrate the reliability of its deterrent. Along with imagery of the cruise missiles, KCNA released one photo of the Hero Kim Kun Ok underway, which you can see at the top of this story.
The launch of a cruise missile, apparently from a vertical launch tube. North Korean state media North Korean state mediaSubmerged launch of one of the North Korean cruise missiles. North Korean state media
KCNA did not otherwise identify the submarine involved or disclose the missiles’ ranges, flight paths, or performance. South Korea’s Joint Chiefs of Staff (JCS) said it had detected and tracked the launches from before firing through the cruise and terminal phases. A JCS spokesperson said one missile type was launched from a vertical launch system and another from a torpedo tube. This would match the imagery we are seeing, it would also match the Hero Kim Kun Ok’s unique capabilities. The South Korean military assessed that the launches came from a submarine but did not initially identify the vessel publicly.
There remains a possibility that the 3,000-ton-class Hero Kim Kun Ok was not actually involved in launching the missiles. North Korea has long used underwater platforms for test missile launches and has paired these with images of an actual submarine for propaganda purposes. However, the JCS confirming they came from a submarine would lend additional credence to the possibility Hero Kim Kun Ok did indeed launch the missiles. If this is the case, it would indicate that North Korea has begun validating weapons systems aboard the submarine ahead of deployment. At the very least, we can confirm that the Hero Kim Kun Ok is now sailing, although South Korean and U.S. intelligence would be acutely aware of its movements and it could have been in at-sea testing for years now, we just don’t know.
North Korea unveiled the submarine in September 2023, describing it as its first “tactical nuclear attack submarine” and one of the Navy’s core offensive platforms. At the launching ceremony, North Korean leader Kim Jong Un was quoted as saying that arming the Navy with nuclear weapons “brooks no further delay.”
The North Korean diesel-electric submarine Hero Kim Kun Ok, which has the hull number 841. North Korean state media
Nevertheless, many questions remain about the submarine’s design and operational prospects. Overall, it remains a heavily modified derivative of a Cold War-era Romeo class diesel-electric submarine — nearly an antique by today’s standards — rather than a purpose-built guided missile submarine. Previous imagery shows 10 missile launch tubes concealed in the prominent ‘turtle back’ aft of the sail, in addition to torpedo tubes, although the precise configuration, usable capacity, and operational status of those systems remain uncertain.
The absence of publicly reported weapons tests from the vessel over the following years raised questions about its development. Analyst Shin Jong-woo of South Korea’s Defense and Security Forum toldReuters that the latest launches suggested combat-system testing for operational deployment was underway. He also suggested that North Korea may have resolved technical problems and could also test a submarine-launched ballistic missile (SLBM) before the vessel enters service. North Korea has previously presented SLBMs of increasing size, but has lacked a suitable submarine to launch them from.
The North Korean diesel-electric submarine Hero Kim Kun Ok during its launch. North Korean state media
Missile launches while the submarine is submerged represent a more demanding and operationally relevant capability than firing from the surface.
At the same time, a missile launch of any kind demonstrates only part of the capability required for a submarine like this to be effective at all. An operational submarine must also be able to deploy reliably, remain sufficiently difficult to detect, maintain its weapons, and execute missions under realistic conditions.
A vertical launch system (VLS) can provide dedicated capacity for certain missile types — potentially much larger ones — and may enable faster launches or larger salvos than a configuration relying exclusively on torpedo tubes. Torpedo tubes offer an alternative launch method, but with different constraints on weapon dimensions, handling, and firing procedures.
The forward four tubes are larger than the rear six on the submarine’s ‘turtle back.’ This would allow the boat to carry multiple types of missiles, possibly including a mix of short-range and longer-range submarine-launched ballistic missiles (SLBMs) and submarine-launched cruise missiles (SLCMs).
A North Korean cruise missile in flight after submerged launch. North Korean state media
Testing both systems would be consistent with an effort to validate multiple elements of the submarine’s weapons architecture.
North Korea has pursued submarine-launched missiles for years. In March 2023, it reported a submarine-launched cruise missile test from the older 8.24 Yongung submarine. In January 2024, Pyongyang said it had fired Pulhwasal-3-31 strategic cruise missiles from that same vessel. The earlier sub is in the 2,000-ton-class and is understood to have only one or two vertical launch tubes.
North Korea’s description of the weapons as “strategic” cruise missiles should also be treated cautiously. North Korea’s long-range cruise missile program is well established and a nuclear payload is a major part of its ambitions, but how mature or reliable a nuclear warhead is for this application at this time isn’t clear. Regardless, ground, surface, and now subsurface-launched cruise missiles are a key part of North Korea’s broader deterrent architecture.
According to reports, Wednesday’s activity was the first publicly reported underwater North Korean missile-testing event since the January 2024 launch.
Compared to the 8.24 Yongung submarine, the Hero Kim Kun Ok has a larger hull and additional vertical launch tubes, but it still uses very dated diesel-electric propulsion, which presents hugely different endurance, acoustic, and operating constraints compared with nuclear propulsion or even modern diesel-electric submarine capabilities.
As to the expectation that Pyongyang may test an SLBM from the submarine before deployment, this would be a likely milestone toward North Korea fielding a credible sea-based nuclear deterrent.
North Korean SLBMs identified as the Pukguksong-5 on parade in January 2021. North Korean state media
North Korea is also pursuing a separate nuclear-powered submarine project, unveiled as under construction in March 2025. Its completion and operational timeline remain uncertain. Nuclear propulsion is a much bigger challenge, but if perfected, such a boat would be of considerably greater value, especially as a second-strike capability.
People seen looking at a TV broadcast at Seoul Railway Station showing North Korean leader Kim Jong Un unveiling the manufacturing site for a future nuclear-powered missile submarine at an undisclosed location. Photo by Kim Jae-Hwan/SOPA Images/LightRocket via Getty Images SOPA Images
The sequence is consistent with Pyongyang’s effort to diversify its delivery systems and complicate military planning for South Korea, the United States, and Japan.
A satellite image of the Pongdae Submarine Factory on the northeast coast of North Korea, the center of its submarine development activities. Google Earth
The activity also carries a diplomatic message. North Korea has repeatedly insisted that it will not abandon its nuclear weapons while the United States maintains what Pyongyang calls a hostile policy. It has also rejected the suggestion that adjustments to U.S.-South Korean military exercises would be sufficient to change the underlying relationship.
The tests also follow North Korea’s rejection of an apparent diplomatic opening from U.S. President Donald Trump after Washington sought to reduce tensions surrounding a U.S.-South Korean military exercise.
Kim touring the Sinpo submarine yards back in 2019, the first time we got a glimpse of the future Hero Kim Kun Ok. North Korean state media
A submarine able to launch missiles from less predictable locations complicates defensive planning for South Korea and the United States. The challenge extends beyond intercepting missiles after launch to detecting and tracking the submarine before it reaches a potential firing position. Even a partially capable vessel places additional demands on potential adversaries.
Were things to ‘go hot’ on the Korean Peninsula, any submarine capable of carrying strategic weapons would be at the top of the targeting list for Pyongyang’s adversaries. A submarine based on the archaic Romeo class design would be fairly easy to track from the time it leaves its berth. This is especially the case bearing in mind the sophisticated nature of South Korea’s anti-submarine capabilities.
Future submarines will become increasingly more challenging, however. That problem could intensify if future North Korean boats make more use of Russian assistance in developing their capabilities. Submarine technology is supposedly part of the payment to Pyongyang for its help in the war in Ukraine. This could become a much larger problem, even if Moscow were to provide North Korea with advanced Kilo class boats, for example.
For now, provided that the Hero Kim Kun Ok launched the missiles, which seems most likely, this would indicate that North Korea is advancing weapons integration aboard a submarine intended to expand its offensive naval capabilities. The fact that the Hero Kim Kun Ok is now at sea also signals progress toward deployment.
Whatever the ultimate operational effectiveness of the Hero Kim Kun Ok and its emerging missile armament, Pyongyang continues to demonstrate incremental improvements to its submarine forces.
Click to see full-size image. (Korean Central News Agency)
North Korea said on October 15 it had test-fired two types of submarine-launched strategic cruise missiles off its east coast a day earlier, in a trial aimed at assessing its underwater weapons systems and the reliability of its military deterrent.
The Korean Central News Agency, or KCNA, reported that the tests were designed to examine the readiness of the country’s underwater combat systems and improve the navy’s ability to carry out strategic missions. It said the test “did not have any adverse impact on the security of neighboring countries.”
KCNA did not identify the missiles or disclose their ranges, flight times or intended targets. The designation “strategic” suggests a role in North Korea’s nuclear deterrent, although Pyongyang did not say whether the tests involved nuclear warheads.
Click to see full-size image. (Korean Central News Agency)
South Korea’s military said it had monitored the launches using multiple surveillance assets, tracking the missiles from before launch through the end of their flights.
Capt. Jang Do-young, a spokesperson for South Korea’s Joint Chiefs of Staff, said the military assessed that one missile had been fired from a vertical launch system and the other from a torpedo tube, according to Yonhap News Agency.
South Korean analysts and international news reports identified the vessel shown in the images as the Hero Kim Kun Ok, a roughly 3,000-ton submarine unveiled by North Korea in September 2023. Pyongyang presented it as its first tactical nuclear attack submarine, claiming it could launch nuclear weapons from underwater.
If the identification is correct, the October 14 launches would be the submarine’s first publicly reported live weapons tests.
North Korea previously announced submarine-launched cruise missile tests in January 2024, when it said two Pulhwasal-3-31 missiles had been fired from the smaller, approximately 2,000-ton 8.24 Yongung submarine. That vessel has been used in earlier underwater weapons demonstrations.
The latest test was overseen by Kim Jong-sik, a member of the ruling Workers’ Party’s Central Military Commission, Missile Administration chief Jang Chang-ha and naval underwater weapons engineers, KCNA reported. North Korean leader Kim Jong Un was not reported to have attended.
Shin Jong-woo, secretary-general of South Korea’s Korea Defence and Security Forum, said the latest launches showed that “combat system tests for operational deployment are under way,” according to Reuters.
The commander added that North Korea was likely to test a submarine-launched ballistic missile from the vessel before long.
The tests followed North Korea’s launch of tactical ballistic missiles toward the East Sea on October 12 and a series of other weapons demonstrations in recent weeks. Pyongyang has also highlighted its expanding arsenal at a newly opened defense museum, including missiles designed to extend its potential reach against the United States.
The submarine tests fit into Kim’s broader effort to expand the country’s naval capabilities and diversify the platforms from which it could use nuclear weapons.
An accelerating sell-off of AI-linked shares has hit global markets, as fears over rising inflation and future interest rate hikes spooked traders already wary of the heavily indebted sector.
South Korea’s benchmark Kospi 200index, which is heavily skewed towards the companies that make memory chips, fell more than 8% overnight to a six-month closing low, triggering circuit breakers that brought trading to a halt at various points.
South Korean President Lee Jae Myung welcomed the PanStar Acro and its crew home on Tuesday after the container ship completed the country’s first round-trip commercial trial through the Arctic to Europe, hailing the voyage as a potential alternative to traditional shipping lanes even as questions remain over commercial viability and cooperation with Russia.
Click to see full-size image. (Korean Central News Agency)
North Korean leader Kim Jong Un visited a newly opened defense museum showcasing advanced missiles and other weapons, state media reported on October 13, as United States President Donald Trump raised the possibility of meeting Kim during a visit to Asia next month.
Photographs released by North Korea’s state-run Korean Central News Agency showed Kim and his daughter, Ju Ae, attending the opening of the Defense Revolution Museum.
Notably, the displays included the massive Hwasong-20 intercontinental ballistic missile, which has not reportedly been tested yet.
Click to see full-size image. (Korean Central News Agency)
Click to see full-size image. (Korean Central News Agency)
Click to see full-size image. (Korean Central News Agency)
Click to see full-size image. (Korean Central News Agency)
The exhibits also included a new submarine-launched ballistic missile, the Hwasong-16 hypersonic missile, 600-millimeter and 240-millimeter multiple rocket launchers, 155-millimeter howitzers and the Badasuri anti-ship missile.
Other reported displays included Hwasal cruise missiles, reconnaissance and attack drones, an upgraded Chonma-20 tank and anti-tank guided missiles. Some of the more specific weapon designations remain tentative, as North Korea did not publish a complete inventory of the museum’s exhibits.
The visit came a day after North Korea launched two ballistic missiles from its eastern coast. Both were believed to have fallen outside Japan’s exclusive economic zone, according to Japan’s Defense Ministry.
Trump told reporters in Washington on the same day that he might hold talks with Kim during a trip to Asia next month. The U.S. president is scheduled to attend the Asia-Pacific Economic Cooperation summit in Shenzhen, China, on November 18 and 19.
“I may,” Trump said when asked about a possible meeting. “That’ll be exciting, won’t it? But I get along with him.”
Pyongyang had not publicly responded to Trump’s remarks as of October 13. The museum visit could serve to emphasize North Korea’s military advances ahead of any potential meeting.
Kim described the museum as demonstrating “how the dignity and security of the DPRK and the happiness of its people are defended and how peace of this land is achieved,” KCNA reported.
KCNA also reported that North Korea had test-fired a tactical ballistic missile on October 12 to validate an upgraded core component of its weapons systems. Observers said the missile may have been a Hwasong-11A, also known as a KN-23, which can follow a quasi-ballistic trajectory and is believed capable of carrying a tactical nuclear warhead.
Click to see full-size image. (Korean Central News Agency)
Japan’s Defense Ministry said the first missile traveled about 220 kilometers, reaching a maximum altitude of 20 kilometers, while the second flew more than 910 kilometers at a maximum altitude of 70 kilometers. Japanese Defense Minister Shinjiro Koizumi said Japan, the United States and South Korea were working together to analyze the second launch, including the possibility that it followed an irregular trajectory.
Koizumi condemned the test, saying North Korea’s frequent missile launches highlighted an increasingly serious security environment around Japan. He said North Korea had launched at least 18 ballistic missiles in 11 launches so far this year, with the number of launches already more than doubling and the number of missiles roughly tripling compared with the same period last year.
North Korea has been developing missiles designed to maneuver during flight, complicating efforts to track and intercept them. The country has also pursued intercontinental ballistic missiles capable of carrying multiple independently targetable nuclear warheads, adding to concerns over the range and sophistication of its weapons program.
Park Ki-chang, South Korea’s ambassador to Ukraine, has returned to Seoul after being recalled in protest at Kyiv’s disclosure of information regarding the handover of North Korean prisoners of war to the South Korean side. Shortly before this, Song Yeon-gil, known for his reputation as a Russophile, was appointed as an adviser to the president. […]
Volodymyr Zelensky probably did not expect two North Korean prisoners of war to create a diplomatic crisis with South Korea. That is nevertheless what happened. During his September address to the United Nations General Assembly, Zelensky disclosed that two North Korean soldiers captured while fighting alongside Russian forces had been transferred to South Korea. Seoul […]
By Joyce Lee SEOUL, Oct 11 (Reuters) – A South Korean container ship completed the country’s first commercial round trip to Europe via the Arctic on Sunday, as authorities bank on the...
The South Korean government has released images from its first successful test of a domestically developed hypersonic boost-glide vehicle. This includes shots of the vehicle impacting the water at the end of its flight. A weapon of this kind would give South Korea a significant new way to hold targets in North Korea at risk amid an ever-deepening arms race on the Peninsula.
South Korea’s Presidential Office, more commonly referred to as the Cheong Wa Dae or the Blue House, announced the test in a Korean-language press release yesterday. The Blue House initially released a video of President Lee Jae Myung and others observing the test from a conference room at the Anheung Proving Ground, which is located in South Chungcheong Province on the country’s western coast. South Korea’s Agency for Defense Development (ADD) manages testing at Anheung. A series of still images from the test itself was subsequently posted on the Blue House’s website.
A trio of pictures showing South Korea’s new hypersonic boost-glide vehicle impacting the water during the test yesterday. The Blue HouseAnother view of the impact at the end of yesterday’s South Korea hypersonic test as seen through what looks to be an electro-optical video camera on an aircraft. The Blue House
Included in the still image gallery are shots showing the launch of the missile, a formal name for which has not yet been disclosed, from a wheeled transport-erector-launcher on a platform sitting just off the coast. The low resolution of the pictures makes it hard to tell whether the missile and/or the TEL are of an existing South Korean design or are based on one. We will come back to this later on.
A picture showing the launch of the hypersonic weapon from the platform off the coast. The Blue HouseAnother picture from the test showing the missile after launch. The Blue House
As mentioned, there are also pictures of the hypersonic boost-glide vehicle hitting the water. At first glance, the vehicle looks to have a broadly conical design with stabilizing fins at the base. However, at least one of the fins looks to be truncated. Closer inspection of the available images shows further indicators that might point to it actually having a more wedge-shaped design with a distinct top and bottom, though it is still not definitely clear given the low resolution. Conical boost-glide vehicles are generally understood to be easier to design, relatively speaking, than wedge-shaped ones. Historically, hypersonic boost-glide vehicles of any kind have proven to be technically complex and challenging to turn into viable operational weapons, even by countries with extensive past experience with their development.
Another close-up look at the hypersonic boost-glide vehicle test yesterday, showing what looks to be a truncated fin on one side. The Blue House
“This test launch was conducted to verify, for the first time, the vehicle’s core technologies in a hypersonic flight environment: the performance of ultra-high-temperature heat-resistant materials, guidance and control capabilities, and the ability to perform irregular flight maneuvers at low altitudes,” the Blue House said in its release yesterday, per a machine translation of the Korean text. “The HGV [hypersonic boost-glide vehicle] successfully separated after ascending to the target altitude and executed its planned flight path within the hypersonic environment without any issues.”
With all this in mind, the fact that the vehicle just remained intact through to impact is noteworthy. At the time of writing, South Korean authorities do not appear to have disclosed more specific details about the test, including how far the boost-glide vehicle traveled before hitting the water or what peak speed it reached. Important questions also remain about how the vehicle is guided during the mid-course and terminal phases of flight, challenges that do not appear to have been addressed by this particular test.
In general, unpowered hypersonic boost-glide vehicles need to be brought first to an optimal altitude and speed. This is typically achieved using a sufficiently sized rocket booster, with existing ballistic missile designs often serving as a starting point.
Once released from the booster, a boost-glide vehicle flies along a relatively shallow flight path within the Earth’s atmosphere. The vehicle is able to maneuver along the way, sometimes erratically, while traveling at hypersonic speeds, generally defined as anything about Mach 5.
A graphic showing, in a very rudimentary way, the differences in trajectories between a traditional ballistic missile, a hypersonic boost-glide vehicle, an aero or quasi-ballistic missile, and an air-breathing hypersonic cruise missile. GAO
All of this sets hypersonic weapons of this kind apart from traditional ballistic missiles, even ones with advanced maneuverability capabilities, which all follow a broadly arcing trajectory to their targets. The combination of speed, flight trajectory, and maneuverability offered by hypersonic boost-glide vehicles creates distinct challenges for opponents. They are hard to spot and track, let alone attempt to intercept, and there is less time for defenders to react overall. This ability to penetrate enemy air defenses and cover ground rapidly makes these weapons particularly attractive for strikes on very high-value and time-sensitive targets.
“The HGV [hypersonic boost-glide vehicle] is a ‘key strategic asset capable of changing the game on the battlefield,’ as its unpredictable flight trajectory and overwhelming speed allow it to launch surprise strikes against key strategic targets during contingencies,” the Blue House’s release explicitly noted, again according to a machine translation.
With all this in mind, South Korea does have an entire family of domestically-produced ground-launched ballistic missiles that could be suitable starting places for launching an unpowered hypersonic boost-glide vehicle. President Lee was notably shown a TEL for the country’s newest Hyunmoo-5 ballistic missile at Anheung yesterday, though no explicit connection has been drawn between that weapon and the hypersonic test. The Hyunmoo-5 is itself still a relatively new development, having only entered service around the end of last year.
President Lee Jae Myung and others inspect a Hyunmoo-5 TEL on October 8, 2026. The Blue House
When it comes to new South Korean arms developments, the Hyunmoo-5, which entered service around the end of last year, has been and continues to be a major point of discussion by itself. It is officially categorized as a short-range design, despite how big it is (35 tons gross weight), which is said to be due largely to the equally substantial size of its warhead (17,000 pounds). Past reports have raised the possibility that it could be capable of flying out to intermediate ranges if the warhead weight were reduced. Short-range ballistic missiles are defined as ones with ranges between 190 and 620 miles (300 and 1,000 kilometers), while intermediate-range ballistic missiles can hit targets out to between 1,864 and 3,418 miles (3,000 to 5,500 kilometers). Medium-range ballistic missiles (MRBM) fall in between these two categories.
A Hyunmoo-5 transporter-erector-launcher seen during a parade in 2024. Kim Jae-Hwan/SOPA Images/LightRocket via Getty Images
With its massive unitary warhead, the Hyunmoo-5 already gives South Korea an important new way to hold deeply buried and otherwise hardened targets in North Korea at risk. This fits in directly with the country’s broader Korea Massive Punishment and Retaliation (KMPR) policy, as TWZ has previously written:
“While the Hyunmoo-5 has been widely reported as a future pillar of the KMPR, its specific ability to penetrate deeply buried bunkers, such as those used by the North Korean leadership, the same functions mean that it can also fulfill elements of the ‘kill chain.’ In this way, it could be used as part of a pre-emptive strike, to try and knock out North Korea’s launch capability by targeting its hardened command-and-control facilities and missile storage areas.”
By virtue of the very high speeds they reach in the terminal phase of flight, hypersonic boost-glide vehicles also offer bunker-busting benefits on top of the other aforementioned advantages they bring to the table.
In addition, the hypersonic boost-glide vehicle test reflects a broader arms race that has been expanding in scale and scope for years now. South Korea is also developing an air-breathing hypersonic cruise missile, seen in the composite image below, as well as new air- and sea-launched ballistic missiles, the latter of which will be loaded on new surface warships and submarines.
via X
Though there are always questions about the actual maturity and viability of the designs, North Korea continues to churn out its own new missile developments. This includes two separate test launches of purported new hypersonic designs just in recent weeks. Tit-for-tat missile launches are not entirely uncommon on the peninsula, but there are limits to how quickly a test like the one South Korea conducted yesterday involving an emerging technology can reasonably be staged.
A picture of one of two new purported hypersonic missiles North Korea says it has tested in the past few weeks. North Korean State Media
An operational hypersonic boost-glide vehicle capability would also expand South Korea’s capacity to challenge opponents regionally beyond North Korea. Though the regime in Pyongyang represents the most proximate national security threat to the country, China and Russia have also been growing points of concern for South Korean authorities in recent years.
“We must secure our national security through our own strength,” President Lee said after yesterday’s hypersonic test, per the Blue House’s release. “The government must not rest on today’s success but must further advance the technology so that the hypersonic glide vehicle can establish itself as a robust strategic asset safeguarding our future security.”
South Korea’s President Lee Jae Myung, at center, and others applaud after yesterday’s test. The Blue House
South Korea’s very public test of its new hypersonic boost-glide vehicle underscores the country’s still-expanding efforts to broaden its options for striking even the best-defended targets in North Korea, as well as projecting power elsewhere regionally. At the same time, it remains to be seen when the South Koreans may field a real operational capability in this regard.
Click to see full-size image. (Office of the President of the Republic of Korea)
South Korea conducted the first test launch of its domestically developed hypersonic glide vehicle on October 8, with President Lee Jae Myung observing the event at the Agency for Defense Development’s Anheung Comprehensive Test Site in South Chungcheong Province.
The presidential office later released photographs of the launch and the missile striking its target, providing a visual record of the test.
According to a written briefing by presidential chief spokesperson Kang Yu-jung, the vehicle reached its planned altitude using a booster before separating and descending to a lower altitude. It then performed irregular maneuvers, changing direction vertically and horizontally before accurately striking its designated target.
The test was intended to evaluate heat-resistant materials designed for extreme temperatures, guidance and control systems, and the ability to maneuver at low altitudes under hypersonic flight conditions.
Click to see full-size image. (Office of the President of the Republic of Korea)
Click to see full-size image. (Office of the President of the Republic of Korea)
Click to see full-size image. (Office of the President of the Republic of Korea)
Click to see full-size image. (Office of the President of the Republic of Korea)
Click to see full-size image. (Office of the President of the Republic of Korea)
The government did not disclose the missile’s speed, flight range, altitude or flight duration. The weapon remains under development, with no public timetable announced for operational deployment.
Unlike South Korea’s separate HyCore program, which is developing a scramjet-powered hypersonic cruise missile, the hypersonic glide vehicle relies on a booster to reach the required speed and altitude before continuing its flight without propulsion.
Click to see full-size image. (Office of the President of the Republic of Korea)
Click to see full-size image. (Office of the President of the Republic of Korea)
Lee called for the system’s development and deployment to be accelerated, pledging government support for advanced weapons programs.
After the test, Lee wrote on X that the missile embodied South Korea’s determination to defend itself using its own technology and capabilities.
“Self-reliant defense is not just a slogan — it must be proven through technology and capability,” the president wrote.
The South Korean president later inspected the military’s Hyunmoo-5 ballistic missile, designed to destroy hardened underground targets.
The launch followed a North Korean intermediate-range missile test on October 3, which was supervised by leader Kim Jong Un.
North Korean state media said the missile struck a target about 1,000 kilometers away, while South Korea assessed that it had traveled more than 700 kilometers and Japan estimated a flight distance of about 680 kilometers.
Pyongyang described its launch as part of its hypersonic weapons program, placing the two Koreas’ competing development efforts in sharper focus.
Tensions had already risen after a land mine explosion inside the Demilitarized Zone on September 21 injured three South Korean soldiers. South Korea’s military and the United Nations Command attributed the incident to mines planted by North Korean troops, an allegation Pyongyang denied.
Against that backdrop, Lee’s public appearance at the latest test underscored his administration’s emphasis on strengthening South Korea’s domestically developed weapons capabilities.
What makes the recent military-strategic developments orchestrated primarily by Japan, South Korea, Philippines and United States more dangerous than ever? And how can their impact on the Western Pacific be evaluated? The Western Pacific is quickly becoming as busy with security arrangements as it is with warships, missiles, and military exercises. Japan’s recent efforts to […]
A 22-year-old product tanker sanctioned by the European Union is making an unusual late-season voyage along Russia's Northern Sea Route, highlighting the growing use of older, lower-specification vessels to move petroleum products through the Arctic.
South Korea's presidential office on Wednesday dismissed a Ukrainian report that Russia has imported petroleum products from South Korean ports, calling the accusation inappropriate.
Defense officials from Taliban-controlled Afghanistan spoke with North Korean representatives at Russia's Center-2026 strategic exercises, Afghanistan's Defense Ministry reported. So far, neither Moscow nor Pyongyang has confirmed any meeting, and Kabul disclosed no details of the talks or any agreement.
Since invading Ukraine, Russia has gathered a circle of sanctioned governments it both leans on for its war and props up in return—a trade that runs in opposite directions depending on the partner. Each new tie leaves one more isolated state with a stake in the war grinding on.
Observers among dozens
The exercises ran from 28 September to 3 October in Russia's Chelyabinsk Oblast. The Taliban attended as observers for the first time since it retook power in 2021, Militarnyi reported, one of dozens of foreign delegations present.
Explore further
Russia builds 3,000 jet drones monthly to counter Ukrainian interceptors, HUR says
Mawlawi Nasibullah Madani, commander of the Abdullah bin Masoud Joint Combat Training Command, led the Taliban delegation. The ministry said its officers held discussions with North Korea's military attaché and with officials from China, India, Vietnam, and other countries on bilateral ties and military cooperation. The delegation also toured an exhibition featuring heavy weapons, drones, long-range missiles, and robotic systems.
Moscow's expanding military network
On 27 May 2026, Russia and the Taliban signed a military-technical cooperation agreement. Russia's special envoy for Afghanistan, Zamir Kabulov, claimed the deal is a practical framework focused on repairing Soviet- and Russian-made equipment the Taliban already holds. Russia remains the only country to formally recognize the Taliban government, a step it took in July 2025.
North Korea signed a comprehensive strategic partnership treaty with Russia in June 2024 that includes a mutual defense clause. Pyongyang has since sent an estimated 14,000 troops to Russia's Kursk Oblast. In April, Ukraine's Coordination Headquarters for the Treatment of Prisoners of War put North Korea's losses at 7,058, including 2,251 killed.
Behind the cacophony of the diplomatic rift between South Korea and Ukraine hides a fundamental question: what is the price Seoul has had to pay for access to North Korean prisoners of war and how will this affect regional security? Essence of the Conflict In January 2025, in Kursk Oblast, Ukrainian forces captured two North […]
The 2026 Asian Games in Japan drew to a close on October 4 following two weeks of competition between 45 countries and territories across 43 sports. Despite the official slogan “Imagine One Asia,” fragmented regional politics came to the fore as the event unfolded. Just days before the games officially began, tensions between Japan and […]
Seven tankers made 14 trips from South Korea to Russia's Far East in July and August, carrying more than 176,000 metric tons of fuel, most of it diesel, the Guardian found in a 6 October analysis of port records and ship-tracking data. The UK and EU have sanctioned three of the ships, and one loaded its fuel from another tanker at sea off South Korea instead of at a terminal.
Ukrainian strikes have cut Russia's fuel output as Moscow scrambles for supplies, while fuel loaded at South Korean ports has flowed to Russia. Loadings began to surge in July, the same month South Korean President Lee Jae-myung pledged $100 million for Ukraine's reconstruction, the Guardian reported. That creates a tension in Seoul's policy toward the war: South Korea has provided Ukraine with humanitarian and non-lethal aid but ruled out sending weapons directly, while the fuel trade appears legal under South Korean law even though three of the tankers are under UK and EU sanctions.
Russia imported 368,000 metric tons of oil products by sea in August, 112,000 of them from South Korea, according to Kpler data analyzed by the Centre for Research on Energy and Clean Air (CREA) and cited by the Guardian. CREA's own August report gives 172,000 metric tons in total, including 18,000 from South Korea. Neither explains the gap.
Where the tankers said they were going
The Layla, a tanker under UK and EU sanctions, made two voyages from Ulsan to Vladivostok, carrying a total of 57,000 metric tons of diesel. It left South Korea on 19 July and 10 August. On the first trip, it told South Korean authorities it was bound for Vladivostok; on the second, it declared Niigata, Japan, but sailed to Vladivostok again.
The Astoria, a Russian-flagged tanker under UK, EU, and Australian sanctions, loaded nearly 11,000 metric tons of fuel at Ulsan on 1 August. It declared Japan as its destination but sailed to Vladivostok.
The Chongchon did not berth at a South Korean port. Instead, it took about 26,000 metric tons of fuel from the unsanctioned Celeste I at an anchorage off Yeosu in early August. It declared Singapore as its destination but headed to Vladivostok. The owners and managers of the four tankers did not respond to the Guardian's requests for comment.
Source: Guardian analysis of port records and ship-tracking data; sanctions listings: OpenSanctions. Map: Euromaidan Press
Why Russia needs the fuel
Ukrainian drone strikes have severely disrupted Russia's refining capacity, the Guardian reported. In July, Ukraine's General Staff said the strikes had knocked out 42% of Russia's refining capacity, costing the industry billions of dollars.
Russian refinery throughput fell in June to its lowest level in more than 20 years, and diesel output is down nearly 30% from a year earlier, the International Energy Agency said, according to the Guardian.
Russia has also restricted fuel exports to protect domestic supplies, extending its diesel export ban until the end of October; on 2 October, Deputy Prime Minister Alexander Novak said Moscow could consider partially lifting the ban if there was overproduction, according to the Moscow Times.
Responses to the shipments
Seoul's non-lethal aid has included helmets, body armor, and demining vehicles, and in 2023 it pledged $2.3 billion in support, mostly in loans.
Isaac Levi, an analyst at CREA, told the Guardian:
"It is shocking that EU-sanctioned tankers loaded fuel at South Korean ports and carried it to Russia. This undermines the sanctions regime and South Korea's support for Ukraine."
South Korea's Foreign Ministry did not address the shipments or the sanctioned tankers. In a statement, it said the government supports international efforts to help end the war in Ukraine and bring about a peaceful recovery. The ministry said it was strictly enforcing its export controls and had expanded them to cover 1,402 non-strategic items with high potential for diversion to military use. The UK Foreign Office did not answer the Guardian's questions about UK-sanctioned tankers using South Korean ports, saying only that it remains committed to monitoring its sanctions.
Ties between Kyiv and Seoul are also strained over Ukraine's disclosure of its transfer of two North Korean prisoners of war to South Korea, which Seoul said should have remained private.
Originally published by Pacific Forum, this article is republished with permission. While operational planners in the United States, the Republic of Korea and Japan have made historic strides institutionalizing trilateral security cooperation, the credibility of deterrence ultimately hinges on a more punishing variable: wartime sustainment. Washington, Seoul, and Tokyo have expanded joint exercises, real-time missile […]
North Korea launched an intermediate-range strategic missile from its east coast on October 3, claiming it had been equipped with artificial intelligence technology that allows it to change course while flying at low altitude, state-run Korean Central News Agency reported.
Kim Yo Jong, the sister of North Korean leader Kim Jong Un, said her brother personally supervised the firing drill. She noted that South Korea and Japan tracked the missile and reported flight distances of more than 700 kilometers and 680 kilometers, respectively, calling the figures “interesting numbers.”
“We have already witnessed similar announcements four times and, finally, we came to the conclusion that the superiority of the special flight mode applied to the missiles in our possession has been verified in practice,” Kim said.
She claimed the “enemy” failed to track the targets from their initial skip points when the missile used a wave-like flight trajectory. She also said extending the trajectory during the downward stage produced distances similar to those reported by South Korea and Japan.
“They should acknowledge the speed of the missile,” Kim said, adding that “they would be well advised” to remember previous announcements that the missile is capable of “changing its flight orbit at a low altitude and AI was introduced into it.”
“There is no way to avoid this attack,” she stressed.
Kim added that representatives of the Missile Administration had reported that the newly introduced technology could allow the missile to use at least four different flight-orbit modes depending on its purpose and target.
Kim Jong Un said no other country in the world “could have access to such technology for at least several years,” according to the North Korean statement.
The launch came 13 days after North Korea fired two short-range ballistic missiles from the Wonsan region on September 20. The two missiles were launched within hours of each other toward the East Sea, according to Anadolu Agency’s report.
“We are aware of the missile launch and are consulting closely with our allies and partners,” the U.S. military’s Pacific Command wrote on X.
“Based on current assessments, this event does not pose an immediate threat to U.S. personnel or territory, or to our allies,” the command added, while pledging to defend the United States and its allies in the region.
The October 3 launch follows a cluster of North Korean missile tests in September, including multiple short-range ballistic missile launches on September 12 and two more on September 20.