Ukraine's 413th Separate Raid Regiment of the Unmanned Systems Forces struck the Snizhne Machine-Building Plant in occupied Donetsk Oblast in September, working with other Defense Forces units, the regiment posted on 6 October, sharing a video of the strike. The General Staff reported the strike on the plant on 11 September, saying that the extent of the damage was being clarified.

The strike adds to Ukraine's campaign of long-range attacks on Russian military targets as Russia has begun its winter campaign of strikes against Ukraine's energy infrastructure. Hitting the suppliers of aircraft parts goes after Russia's ability to keep its attack jets and helicopters flying.

The regiment said the plant works for Russia's military industry, producing engine components for attack aircraft and combat helicopters.

A former Motor Sich plant in occupied Snizhne

The Snizhne plant was a separate division of Motor Sich, a Ukrainian aircraft-engine maker based in Zaporizhzhia, a city that remains under Ukrainian control. Snizhne has been under Russian occupation since 2014. The plant specializes in producing parts for gas-turbine engines, including compressor and turbine discs and blades, the General Staff said. It never built whole engines. In September 2014, months into the occupation, it was machining blanks from Motor Sich's Zaporizhzhia plant into turbine blades and was one of only two plants in the former Soviet Union making such blades for helicopters, a plant worker said.

Motor Sich said in December 2017 that it had lost control of the plant. Weeks later, Viacheslav Bohuslaiev, then Motor Sich's honorary president and a member of parliament, told RFE/RL's Donbas.Realii that Motor Sich still owned the plant and had handed its management to a foreign company, while keeping it under the company's "full control."

In February 2023, Ukraine's Prosecutor General's Office served Bohuslaiev a notice of suspicion of aiding a terrorist organization, alleging that Motor Sich shipped blanks to the Snizhne plant and received finished engine parts through foreign-registered companies. The case went to court in October 2023, and Bohuslaiev, who denies the charges, has been in pretrial detention since October 2022 as the trial continues.

Snizhne, which Russia uses as a rear base, has been hit before. In May, Ukraine's Unmanned Systems Forces and the Security Service of Ukraine struck a Russian training center for drone pilots in the city, and in September, a strike on energy infrastructure cut power across Snizhne.

Ukraine's state railway, Ukrzaliznytsia, has added 18 Kyiv City Express shuttle runs between Vydubychi and Darnytsia for 5–9 October, while the government has begun preparatory work on temporary crossings over the Dnipro River after Russian strikes disrupted bridge traffic. Minister for Restoration, Infrastructure and Transport Mykola Kalashnyk outlined the backup plan in an interview with Suspilne on 3 October.

About 600,000 vehicles cross the Dnipro in Kyiv each day, making the river crossings critical to movement across the capital, Kalashnyk said. Russia's attacks on the Southern and Northern bridges have disrupted traffic, with the Southern Bridge fully closed to cars and metro on 2 October and restrictions introduced on other crossings. The risk of further damage is heightened by Russia's upgraded jet-powered Geran-4, which now carries a specialized warhead designed to cut through bridge structures and power-line supports, according to presidential adviser Serhii Beskrestnov.

Jams, restrictions, and extra trains

On 6 October, large traffic jams formed between Kyiv's left and right banks, with the heaviest queues on approaches to the Southern Bridge, Obozrevatel reported. The jams followed Russian strikes that cratered the Northern Bridge.

Green-line metro trains resumed carrying passengers between the banks during the yellow threat level on 4 October, Radio Svoboda reported. Under the current restrictions, traffic on the Southern and Podilskyi bridges is stopped in certain directions for at most the first 15 minutes after an air alert begins.

The additional Kyiv City Express shuttles run during the busiest hours, 06:00–09:00 and 16:00–21:00. Together with scheduled suburban and regional trains, they bring the number of peak-hour runs between the banks to up to six, Ukrzaliznytsia said.

Pontoons first, tunnel later

Kalashnyk said the government plans to build several backup crossings over the Dnipro. The sites have already been chosen, and he named a combination of earth embankments and pontoon crossings as measures that can be built quickly. He said construction could take up to three months and that the backup crossings should provide at least 50% of the capacity of the existing bridges. The government is also considering quick-build concrete structures and, in the longer term, a tunnel under the Dnipro, he told Suspilne.

Volodymyr Kreidenko, deputy head of the parliamentary committee on transport and infrastructure and an MP from the Servant of the People party, proposed reversible traffic across the bridges: "in the morning from the left bank to the right, in the evening from the right to the left." He also suggested hubs near the bridges where people could take a bicycle or e-scooter, and passenger ferry crossings, Radio Svoboda reported.

Andrii Koretskyi, an associate professor in the department of bridges, tunnels and hydraulic structures at the National Transport University, cautioned that temporary crossings cannot substitute for a permanent bridge.

"The only alternative to a bridge is a bridge as a permanent structure," he told Radio Svoboda.

He said a tunnel under the Dnipro is technically possible but "not a quick solution at all." He pointed to the scale involved: where the Irpin River requires spanning a few dozen or, in places, a few hundred meters, the Dnipro within Kyiv is "roughly 400 to 1,500 meters" wide.

Ukraine has found the US component in a Russian jet-powered drone targeting civilians, supermarkets, medical warehouses, and bridges. According to its Defense Intelligence, the new weapon contains a PNI5GA magneto-inductive sensor made by the US company PNI Sensor.

The US-made navigation component adds to evidence that Western technology continues to appear in Russia's strike drones. HUR had already identified US-made chips in the Geran-4 in May, but the newly reported PNI5GA is a navigation sensor in a modified version of the drone that Institute for the Study of War (ISW) says Russia may seek to field ahead of winter.

A Russian engine replaces the Chinese one

Russia has also replaced the drone's Chinese-made Telefly turbojet engine with a Russian-made equivalent produced in Alabuga. Russia is using the Alabuga zone to bring more of its drone production home rather than importing Iranian or Chinese parts, according to the ISW.

"The remaining electronic units and components are unchanged and identical to those used in previous Geran UAVs," HUR said.

What the warhead is built to cut

The modified drone also carries a specialized KRSN warhead designed to cut through bridge structures and power-line supports. Presidential adviser Serhii Beskrestnov described the warhead on 30 September, saying it consists of a 40-kilogram main charge and four strike modules. Its warhead is meant to destroy hardened targets made of steel and concrete and to damage cable-stayed bridges.

Russia has stepped up strikes on Kyiv's Northern and Southern bridges across the Dnipro in recent days with such drones.

However, Russia may try to field more resilient and more dangerous versions of its strike drones before Ukraine has effective countermeasures in place. Russia could use them to degrade Ukraine's energy infrastructure and logistics ahead of a winter strike campaign that it said will very likely be brutal.

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.

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.