Fire and outage at Yandex data center after drone attack
The drone attack on the facility in Sasovo, southeast of Moscow, set the site on fire, suspended operations, and sent Yandex shares down more than 3.4 percent. The company behind YandexGPT cannot promise the equipment can be recovered — and Newsweek describes it as the first confirmed attack on Russian data infrastructure during the full-scale invasion.
Operations at a data center owned by the Russian technology company Yandex have been suspended after a Ukrainian drone attack on Thursday. Newsweek reports the account, basing it on Yandex's own information.
The facility is located in the town of Sasovo, around 250 miles (roughly 400 kilometers) southeast of Moscow. Yandex said a fire broke out after the attack, and the company told Newsweek on Thursday that it was still working to assess the damage to the infrastructure. "We cannot confirm whether the equipment in our Sasovo data center can be recovered," the company told the outlet.
The disruptions began at around 01:31 in the early hours of Thursday, according to company information cited by Newsweek. At the same time, Yandex warned that the outage could affect other parts of its cloud network — a warning that is particularly relevant because the company stands behind YandexGPT, one of Russia's leading generative AI models, which depends on the company's computing capacity.
The stock market reacted quickly: Yandex shares fell more than 3.4 percent in Thursday morning trading on the Moscow Exchange.
Exactly What Is Confirmed — and What Is Not
The attribution of the attack currently rests on Yandex's description of a strike, not on Ukrainian confirmation. Ukraine has not confirmed the attack, and the country typically does not immediately confirm strikes on Russian territory. Newsweek says it has contacted the Ukrainian defense ministry for comment.
There is also uncertainty about the target: The data center shares its site with the sanctioned Sasta machine tool factory, which produces equipment used in Russia's military-industrial sector. Which of the facilities was the intended target is unknown, and the sources provide no basis for speculating about the matter.
"First Attack on Russian Data Infrastructure" — Newsweek's Characterization
Newsweek characterizes the incident as the first confirmed attack on Russian data infrastructure since Russia's full-scale invasion of Ukraine. This characterization has not been independently confirmed in other available sources, and should be read as the outlet's assessment, not as documented fact.
The context is nonetheless striking: The attack follows Russian forces striking at least eight major data centers in Kyiv, causing internet blackouts across Ukraine. Russia claims those centers process Ukrainian military intelligence — a claim that belongs to the Russian side and has not been independently confirmed.
Why This Matters
Yandex is often described as Russia's answer to Google, and it is the country's leading technology company. That a commercial company's data infrastructure — not just military facilities — is now being hit on Russian soil marks a potential expansion of the war's target set.
The consequences may become tangible for Russia's domestic AI and cloud capabilities. YandexGPT depends on infrastructure to which the Sasovo facility contributes, and Yandex's own warning that the outage could affect other parts of its cloud network points toward broader disruption than a single building.
Open Questions
Several key questions remain unanswered:
- Extent of the damage: Yandex has not said how severe the damage is, and cannot promise the equipment can be recovered.
- The exact date: The sources only specify "Thursday," without a calendar date.
- Scope of the cloud disruption: It is uncertain how many services are affected beyond the Sasovo facility.
- A lasting expansion of the target set: Whether this incident is a one-off or the beginning of a systematic campaign against Russian data infrastructure.
- Ukrainian confirmation: Whether the Ukrainian defense ministry will comment on the matter.
As long as Ukraine has not confirmed the attack and Yandex is still assessing the damage, several of the most fundamental questions about the incident — who was behind it, what the target was, and how much has been destroyed — remain without definitive answers.