Russian tech giant Yandex's data center in Sasovo burned out from the inside, a Ukrainian OSINT analyst wrote on 22 October. On cloud-free satellite images, he saw almost no significant holes in its roof. Ukrainian drones hit the site overnight on 8 October.
Sasovo was the first strike on a data center in Russia. It came two weeks after Russia destroyed data centers in Kyiv. Drones then hit Yandex sites in Vladimir and Kaluga, a Sber data center, and a VK data center near St. Petersburg, which VK acknowledged. In occupied Donbas, monitoring channels reported hits on buildings housing telecom operators.
The analyst, who goes by Harbuz, runs the Ukrainian OSINT channel Dnipro Osint. His roof reading comes from the images. His interior claim comes from what he called available information: he wrote that a fire broke out inside and put part of the equipment out of action.
In an earlier post, Harbuz wrote that a third of the data center had burned out. In the new one, he writes that the building burned out from the inside. He does not say whether he revised the earlier figure.
Russian outlet Agentstvo studied Airbus images from 12 October. It found damage on about a third of the building. Unlike Harbuz, though, Agentstvo described a blackened western roof with damage resembling holes.
On 8 October, Yandex stated that the attack caused a fire and forced it to suspend operations at the site, which hosts tens of thousands of servers, Reuters reported. Yandex Cloud and the Disk and Documents services that run on it ran with major disruptions that morning, Russian outlet The Bell reported.
Later that day, the company stated: "The scale of the damage to the infrastructure is still being assessed. For the moment, we cannot confirm whether it is possible to restore the data centre equipment in Sasovo." Two of Yandex's three supercomputers, used to develop its AI model, are housed there.
The same day, journalists asked Ukrainian President Volodymyr Zelenskyy whether Ukraine was targeting Russian data centers. He did not refer specifically to the Yandex strike, Reuters noted, but said: "We always respond in mirror-like fashion."
In a government office, researchers of drones and electronic warfare gather around a small metal device recovered from a Russian Geran drone. Its purpose — to measure the Earth’s magnetic field for navigation.
"This is the most recent component we found, about a week or two
Russian forces are preparing to resume mechanized assaults in southern Ukraine after a pause of several months and are moving armored vehicles toward areas where they plan to launch offensives, Anastasiia Shevchenko, deputy spokesperson for the Southern Forces Grouping, told Ukrinform on 22 October. The Huliaipole axis remains the hottest in the Southern grouping’s zone, with 10 to 20 combat engagements reported on an average day, she said.
On the Huliaipole axis, one of Russia’s largest force groupings is fighting Ukrainian forces, comprising units from several Russian combined-arms armies, the spokesperson says. Over the past week, as the weather worsened, Russian forces began local assaults there with infantry, motorcycles, and armored vehicles, seeking to break through toward Zaporizhzhia and blockade the city, Ukraine’s 7th Air Assault Corps reported, adding that the area is one of Russia’s key priorities in southern Ukraine. Russia has used fog this way before: last November, Russian troops moved under its cover to avoid detection by Ukrainian drones as they advanced on Huliaipole, the Institute for the Study of War assessed.
Russian forces have abandoned large-scale assaults across a broad front and are attempting to infiltrate Ukrainian positions in small groups. They periodically use motorcycles and quad bikes for assaults, Shevchenko said, adding that these vehicles are fast and maneuverable.
However, Russian forces should not expect to advance unimpeded, the spokesperson noted. Ukrainian units control Russian supply routes and systematically detect and strike Russian personnel and equipment while they are still moving toward their launch positions, she added.
“Specifically, speaking in numbers, since the beginning of October alone, units of the Southern Forces Grouping (Forces) have destroyed more than 3,000 occupiers and 1,300 pieces of weapons and military equipment. Thus, the enemy is suffering significant losses in the operational zone of the Southern Forces Grouping (Forces),” the spokesperson concluded.
Russian forces had stopped using military vehicles because Ukraine’s unmanned systems forces controlled their logistics, Shevchenko said in comments to Ukrinform on 16 September. Ukrainian drones spotted Russian troops and equipment in time and struck them mostly on their routes of advance, she said.
Ukrainian air strikes destroyed bridges near Polohy in Zaporizhzhia Oblast, complicating Russian supply operations along the Huliaipole axis, Ukraine’s 7th Air Assault Corps reported on 21 September. Russian forces had used these bridges to move personnel, heavy equipment, and ammunition for their offensive toward Orikhiv. Disruptions to logistics have forced Russian units to rely more on motorcycles, which are more vulnerable to Ukrainian strikes, the corps said.
Russian forces are also expected to use fog and rain as cover for assaults, Mykola Zinko, deputy commander of the unmanned systems battalion of the 5th Assault Brigade, said on 19 October. Russia has brought up reserves, and its heavy equipment will move out under the fog, he said.
Ukraine’s military intelligence (HUR) published a 3D model and parts list of Russia’s new Filin cruise missile on 22 October. The breakdown names the Russian companies behind the missile and the foreign makers of its electronics.
HUR runs its War&Sanctions portal to trace such parts back to their makers. Its stated aim is to “deprive the aggressors of the ability to produce weapons for terror,” the portal says. Meanwhile, Russia is betting on cheap, fast cruise missiles, Serhii Beskrestnov, a freelance adviser to the president on technology, told Radio NV in mid-September. Naming the Banderol, Dan-T, Dan-M, and Gerbera-5, he warned they would soon outrun Ukraine’s jet-powered interceptors, so Ukraine needed its own cheap missiles to shoot them down.
JSC NPO Molniya, part of Russia’s Tactical Missiles Corporation, builds the Filin, HUR said. The agency called it part of a Russian defense-industry trend toward cheap jet-powered, ground-launched air-attack weapons. Russia began firing it at Ukraine in late summer 2026.
HUR’s data puts the carbon and fiberglass fuselage at 3.5 m, with a 3 m wingspan. Some parts are 3D-printed. Russia claims a top speed of 800 km/h. The range is 600–1,200 km, and the missile flies at ultra-low altitude or up to 6 km. Versions carry 50-kg or 100-kg warheads. A solid-fuel booster fires it from a ground launcher.
PLAZ LLC makes the onboard equipment, HUR said. The firm also helps produce the Garpiya, a version of Russia’s Shahed-type Geran-2 drone. Filin and Garpiya units share a similar layout and markings. Guidance combines a Chinese-made inertial navigation system with a 16-channel Kometa anti-jamming module from Russia’s VNIIR-Progress.
The electronics resemble those in other Russian missiles and drones but carry a larger share of Chinese parts. Of 81 components, 35 are American and 22 Chinese. The engine, however, is Russian: an R500 turbojet from Reynolds LLC. A similar engine earlier turned up in the S-71K Kover aviation cruise missile and S-71M Monokhrom, HUR said.
For comparison, Ukraine found more than 20 foreign components in a different cheap missile, the Banderol, in May 2025. They included 10 US microchips, and the Banderol flies on a Chinese jet engine.
As of October, Russia has up to 700 ballistic and several thousand cruise missiles in reserve, and its 2026 state order for Geran-type drones and decoys such as the Gerbera exceeded 100,000 units, Ukraine’s military intelligence (HUR) told NV in figures the outlet published on 20 October. The missile stocks are roughly the same as HUR reported to NV in July, the outlet found.
Ukraine enters the heating season facing what it says is a Russian plan to hit 60 infrastructure sites this winter. HUR’s figures suggest Russia has the weapons for it, even after its fall mass strikes. In June, HUR said Russia could fire up to 100 ballistic missiles a month while keeping its stocks steady. Its drone output, meanwhile, is shifting to jets that are harder to shoot down.
Russia can make more than 200 missiles a month, 110 of them ballistic, HUR said. About 115 of its ballistic missiles are Iskander-Ms, with production of up to 65 a month. A modernized Iskander with a projected range of 550 to 700 km is in development.
At the same time, Russia holds up to 400 S-300PM and S-400 air defense missiles adapted to strike ground targets, and makes about 40 a month. Meanwhile, Kinzhal production has been temporarily paused over poor accuracy, and the capacity has gone to conventional ballistic missiles.
Russia plans to make more than 80 Kh-101 cruise missiles a month and is exceeding that, though defects in releasing them from aircraft have sent some batches back to the factories.
Russia has more than 450 Kalibrs and makes about 29 a month. Because Ukrainian air defense downs them effectively, Russia sends most new ones to its strategic reserve and to equip its fleets, HUR said. It also holds more than 600 Oniks anti-ship missiles, upgraded for ground strikes, and more than 120 Zircons.
Russia holds a reserve of about 6,200 Gerans and makes about 10,000 drones a month. Its main production hub is the Alabuga special economic zone in Tatarstan.
Since summer, Russia has shifted toward turbojet drones. “The reason is the saturation of Ukraine’s Air Force with mobile fire groups that shoot down low-speed targets en masse,” HUR said. Russia now assembles about 4,000 jet drones a month, mostly Geran-4s and Geran-5s, which fly at 400 to 500 km/h. It also makes about 2,000 cheaper propeller-driven Geran-2s, which HUR said are used to wear down air defense and locate air defense positions.
In a direct confrontation with Russia, European NATO states would likely be even more vulnerable than Ukraine to swarms of Russia’s new jet-powered strike weapons, Fabian Hoffmann of the Norwegian Institute for Defence Studies (NIDS) argued in a 20 October op-ed for the Center for European Policy Analysis (CEPA). He calls them low-cost cruise missiles. Just three days earlier, Romania met what it believes were two of them over the Black Sea.
Romanian F-16 fighter jets shot down two jet-powered Geran-family drones over Romania’s territorial waters on 17 October, the Defense Ministry said. Interim Defense Minister Radu Miruță said they flew at about 450 km/h and were likely Geran-4s, the first of that type Romania had downed.
Russia began using the Geran-4 in May in response to effective Ukrainian interceptor drones, Ukraine’s military intelligence (HUR) said, adding that it reaches up to 500 km/h. By June, those interceptors were downing about half of slower Shahed-type drones, defense adviser Serhii Beskrestnov estimated.
Hoffmann traces the shift to the Geran-3, a model Ukraine recovered intact in 2025. In his account, a Chinese JT80 turbojet roughly doubled its speed, from 185 to 350 km/h. However, he puts newer models, including the Geran-4, at 600 km/h or more, above HUR’s figure for that model.
By his estimate, each costs $150,000–$250,000, against about $50,000 for a long-range drone. Still, from Russia’s perspective, he wrote, that buys a significantly higher chance of getting through.
Hoffmann argues defenses must match the threat’s speed, for example with jet-powered interceptor drones. Ukraine already fields some. On 4 October, President Zelenskyy said its Bars interceptors had shown the highest percentage among Ukrainian interceptors, about 30% of targets, according to Militarnyi. One unit destroyed five aerial targets with five Bars interceptors, Defense Minister Yevhenii Khmara later told journalists. He also called aviation one of the most effective tools against jet drones.
Hoffmann’s concern is scale. Jet engines are in short supply, he wrote, because too few European and US suppliers can meet demand. Ukraine’s Defense Industry Council flagged a shortage of such engines for its drones in April. In his view, gun systems and higher-end missile defenses are too scarce or too costly to fill the gap.
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