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A Ukrainian drone attack started a fire at a data center in Sasovo, Ryazan region, and the facility has halted operations. The center houses two Yandex supercomputers, but the company has not reported their condition; the strike’s intended target is also unclear.
A Ukrainian drone attack started a fire at a Yandex data center in Sasovo, 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, while the company has warned that some services may be unavailable.
Users have reported problems with Yandex services, including Yandex Cloud and the Yandex Disk and Yandex Documents services that depend on it. Meduza also reported outages affecting the websites of Cian, Russian Railways and administrations in several regions. Yandex has warned of possible service interruptions, but the available report does not specify how many users or services are affected or how long disruptions may last.
The strike hit the grounds of the Sasta machine-tool plant. Ryazan region authorities did not name the plant in their account, saying only that the roof of “one of the enterprises” caught fire after the attack. The Sasovo data center has occupied part of Sasta’s former premises since 2014. Meduza cited employees who showed the center’s equipment in September and said they worked in Sasovo.
The facility houses Lyapunov and Chervonenkis, two systems Yandex uses to train neural networks. The science-focused outlet T-invariant describes Chervonenkis as the company’s most powerful supercomputer. Yandex has not said what condition either system is in following the fire. The company’s third supercomputer, Galushkin, is located in Vladimir, according to Meduza.
Service Disruptions and AI Computing
The halt puts a data center used for Yandex’s cloud services out of operation and has coincided with reported problems across several websites. The extent of the disruption is not yet established, but the reports show that an incident at one facility can affect services used by other organizations when they rely on the same cloud infrastructure.
The fire also raises questions about the availability of computing capacity used to train neural networks. Two of Yandex’s three named supercomputers are at the Sasovo site. That makes their condition relevant to the company’s computing resources, although there is no confirmed report that either machine was damaged. Meduza reported that Yandex shares fell more than 3% amid the strike, citing Moscow Exchange data; that movement does not establish how investors assessed the facility’s damage or any longer-term effect.
The location adds another layer to the incident. The data center occupies former premises at a plant that Meduza says supplies machinery to Russian industrial customers. The independent Telegram channel Astra says Sasta also provides a production base for defense enterprises. Those details describe the site and its reported industrial connections; they do not establish why it was struck.
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The Sasovo Site and Its Systems
Yandex is one of Russia’s leading IT companies, according to Meduza. Its Sasovo data center has operated on part of the former Sasta premises since 2014. The two systems based there, Lyapunov and Chervonenkis, are used to train neural networks. T-invariant reports that Chervonenkis ranked 19th in the global Top 500 supercomputer list in 2021, then fell into the second hundred in later rankings as sanctions made infrastructure updates difficult.
The attack also comes amid reported strikes on data centers in Ukraine. Meduza says that since September 23, facilities belonging to at least eight companies have been damaged or destroyed, with some attacked more than once. Russia’s Defense Ministry said those Ukrainian data centers “provide for the processing and transmission of intelligence data in the interests of the Ukrainian Armed Forces.” That is the ministry’s stated justification, not independent confirmation of how each facility was used.
Meduza describes the attacks on Ukrainian infrastructure as part of a wider Russian campaign against sites including bridges, railways, gas stations, shopping centers and warehouses. That broader pattern is relevant to the timing of the Sasovo strike, but it does not show whether the Yandex facility or the Sasta plant was the intended target.
““one of the enterprises””
— Ryazan region authorities, as quoted by Meduza
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Damage and Target Remain Unknown
It is not yet clear whether the data center or the Sasta plant was the intended target. Ukraine has not officially commented on the strike, according to the report, and Ryazan region authorities did not identify the enterprise whose roof caught fire.
Yandex has not reported the condition of Lyapunov or Chervonenkis. The report confirms that the center stopped operating, but does not establish whether the fire reached the supercomputers, damaged other equipment, or caused lasting losses. The scale, duration and causes of the reported service outages also remain uncertain. No injury reports were given in Meduza’s account.
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Yandex’s Damage and Service Updates
The next key information will come from Yandex’s assessment of the site: whether the supercomputers were affected, how much of the facility is damaged and when operations can resume. Updates from Yandex may also clarify which cloud services and dependent websites remain disrupted and whether users should expect service interruptions to continue.
Further statements from regional authorities or Ukraine could clarify the circumstances of the attack and the site’s status. Until those details are available, the intended target and the full operational consequences remain open questions.
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Key Questions
Where did the attack take place?
Meduza reported that a Ukrainian drone attack started a fire at a Yandex data center in Sasovo, in Russia’s Ryazan region. The strike hit the grounds of the Sasta machine-tool plant.
Which Yandex supercomputers are at the site?
The Sasovo center houses Lyapunov and Chervonenkis, which Yandex uses to train neural networks. The company has not reported their condition. Its third system, Galushkin, is in Vladimir, according to Meduza.
Are Yandex services experiencing outages?
Users have reported problems with Yandex services, and the company warned that some services may be unavailable. Meduza also reported problems affecting Yandex Cloud, Yandex Disk and Yandex Documents, as well as several other websites. The extent and duration of the disruptions are not confirmed.
Is it known what the strike was targeting?
No. The report says it is unclear whether the plant or data center was the intended target. Ukraine has not officially commented, and regional authorities did not name the plant in their account.
Source: rss
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