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A Ukrainian drone attack started a fire at a Yandex data center in Sasovo, Russia’s Ryazan region, and the facility has halted operations, according to Meduza. The site houses two of Yandex’s three supercomputers; the company has not said whether they were damaged, while outages have been reported across several services and other websites.
A Ukrainian drone attack started a fire at a Yandex data center in Sasovo, in Russia’s Ryazan region, and the facility has completely halted operations, according to Meduza. No injuries were reported. The site houses two of Yandex’s three supercomputers, but the company has not disclosed their condition; disruptions have also been reported across Yandex services and several other websites.
Meduza reported that the fire began on the grounds of the Sasta machine-tool plant, where Yandex’s data center occupies part of a former plant premises. Ryazan regional authorities said the roof of “one of the enterprises” caught fire after the attack but did not name the facility, Meduza reported. The outlet identified the site as Sasta’s grounds.
Yandex warned that some services might be unavailable. Users reported problems with Yandex Cloud and services relying on it, including Yandex Disk and Yandex Documents. Outages were also reported at the websites of Cian, Russian Railways, and administrations in several Russian regions. Meduza did not specify the duration or full reach of the disruptions.
The Sasovo center houses Yandex’s supercomputers Lyapunov and Chervonenkis, which the company uses to train neural networks. Science-focused outlet T-invariant has described Chervonenkis as Yandex’s most powerful supercomputer. Yandex has not reported whether either machine was damaged or whether the systems were operating when the fire began.
Supercomputers and Service Disruption
The facility’s shutdown could affect more than the physical data center: the reported problems span cloud hosting and connected services, alongside unrelated organizations’ websites. The available reporting does not establish whether those external outages were directly caused by the Sasovo incident, or whether they share a common dependency.
The site’s role in Yandex’s computing infrastructure also makes the damage relevant beyond immediate consumer access. Two of the company’s three named supercomputers are based there and are used to train neural networks. If either machine has sustained damage, the consequences for capacity or research schedules are not yet known. No damage to the supercomputers has been confirmed.
Meduza said Yandex shares fell by more than 3% during trading on the Moscow Exchange amid the strike. That figure reflects the reported market move in the period covered by the report; it does not by itself establish the strike as the sole cause of the share-price change.
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Sasovo Site and Yandex’s Systems
Yandex’s data center has occupied part of the former Sasta premises since 2014, according to Meduza. In September, employees at the center showed its equipment and said they worked in Sasovo, the outlet reported. Sasta produces pipe-threading machines for export and for machine-building plants across Russia. Meduza, citing the independent Telegram channel Astra, said the plant also provides a production base for defense enterprises and is on sanctions lists maintained by several Western countries.
The two Sasovo supercomputers are part of a three-system group. The third, Galushkin, is located in Vladimir, Meduza reported. Chervonenkis ranked 19th in the 2021 Top 500 list of the world’s supercomputers; the report said it later fell into the list’s second hundred amid difficulties updating infrastructure because of sanctions. These details describe the systems’ prior status, not their current condition.
The attack also comes amid reported strikes on data centers in Ukraine. Meduza said at least eight companies’ facilities had been damaged or destroyed since September 23, with some attacked more than once. Russia’s Defense Ministry has claimed that Ukrainian data centers process and transmit intelligence for Ukraine’s armed forces. That assertion is a Russian government claim; the report does not independently establish it as the purpose or function of the facilities discussed.
“The roof of “one of the enterprises” caught fire after the Ukrainian attack.”
— Ryazan region authorities, as quoted by Meduza
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Target and Damage Assessment
Several key details remain unresolved. Ukraine has not officially commented on the attack, and it is unclear whether the data center, the Sasta plant, or another facility was the intended target. The available reporting also does not establish the cause of the fire beyond its occurrence after the attack.
Yandex has not provided a damage assessment for Lyapunov or Chervonenkis, nor has it said how long the data center will remain offline. The full extent and cause of reported outages at Yandex and other organizations are likewise unclear. Regional officials’ description of a fire at an unnamed enterprise does not confirm the condition of the data center’s equipment.
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Recovery and Further Statements
The next indicators will be a Yandex update on the facility and its supercomputers, any revised service-availability notices, and information from regional authorities about damage and recovery work. The reporting provided no restoration timetable, so users and customers do not yet have a confirmed estimate for when affected services will return to normal.
Further statements from Ukrainian officials could clarify whether the attack was acknowledged and what target was intended. Until more evidence or official information is available, claims about the strike’s objective and the operational impact on Yandex’s computing capacity remain unconfirmed.
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Key Questions
What happened at Yandex’s Sasovo data center?
Meduza reported that a Ukrainian drone attack started a fire at the site in Russia’s Ryazan region. The center halted operations, and no injuries were reported.
Were Yandex’s supercomputers damaged?
That has not been confirmed. The Sasovo center houses Lyapunov and Chervonenkis, but Yandex had not reported their condition in the available report.
Which services have reported problems?
Meduza reported problems affecting Yandex Cloud, Yandex Disk and Yandex Documents, as well as outages at the websites of Cian, Russian Railways, and several regional administrations. The cause and duration of all reported disruptions were not established.
Was the Yandex data center the intended target?
It is unclear. Ukraine had not officially commented, and Ryazan authorities described a fire at an unnamed enterprise rather than identifying a specific target.
When will the data center and affected services be restored?
No restoration timetable was reported. The duration of the shutdown and the extent of damage remain unknown pending further updates from Yandex and local authorities.
Source: rss
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