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.

What the analyst sees

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.

What Yandex says

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."

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 produces 110 ballistic missiles a month

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.

Most new Kalibrs go into reserve

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.

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Russia now assembles 4,000 jet drones a month

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.