The facility housed the Galushkin supercomputer, built for machine-learning workloads, according to The Insider. In the June TOP500 ranking it placed 134th worldwide with a performance of 16.02 petaflops. The system runs on AMD EPYC processors and NVIDIA A100 graphics accelerators.
The company said the infrastructure was damaged, operations were fully halted and no employees were hurt. It is the third Yandex data centre attacked in four days, after strikes on sites in the Ryazan and Kaluga regions.
Yandex's two other supercomputers, Chervonenkis and Lyapunov, are housed in a data centre in Sasovo in the Ryazan region, which was attacked on 8 October. The Insider noted that over four days the strikes hit the sites holding all three of Yandex's supercomputers. Whether that equipment was damaged has not been specified.
After the attack, the Yandex Cloud platform switched to emergency mode, with two of its zones unavailable. "We consider the remaining resource configuration unstable," the company said. "We recommend using any other alternative disaster recovery plans." Yandex Go, Yandex Pay, Yandex Eda, Yandex Pro, Alisa and other services stopped working in various Russian regions, including Siberia.
Users reported being unable to call a taxi in Moscow, St Petersburg, Rostov-on-Don, Yekaterinburg, Perm, Krasnoyarsk, Ulan-Ude and Vladivostok. Disruptions were also recorded abroad, in Serbia, Kazakhstan, Belarus and Armenia. According to Ostorozhno, Novosti, Yandex's internal apps for couriers, drivers and support staff were also down. The state veterinary system VetIS was moved to emergency mode "in connection with the emergency power outage in the Vladimir region."
Vladimir region Governor Alexander Avdeyev said the attack knocked out two substations supplying electricity to about five thousand residents, and people were evacuated from nearby buildings. An hour later he said power supply had been restored to 80% and heat and water supply to 100%.
According to The Insider, construction of the Vladimir data centre began in 2016. The site covers 14.48 hectares, with a projected capacity across all phases of 2,880 server racks at an allocated capacity of 50 MW. In March, another data centre with 2,800 racks and 40 MW was launched nearby; no reports of damage to it have been received.
Amid the attacks, Yandex agreed with VK Cloud, Selectel and K2Cloud on an accelerated transfer of services for affected clients. According to The Insider's estimates, by mid-2026 Yandex Cloud served 64,000 clients. The timeline for restoring the damaged infrastructure is unknown. A day before the third attack, the company added a force majeure clause to its user agreement covering drone and missile attacks.
Ukrainian drones also attacked Sochi overnight on 11 October. The operational headquarters of the Krasnodar region said "drone fragments" fell on the airport grounds, one administrative building caught fire and no one was hurt. Russia's Defence Ministry said air defence forces downed 479 Ukrainian drones over 17 regions and Crimea during the night.