A reported Ukrainian drone strike has interrupted operations at a Yandex data centre in Russia’s Ryazan region, while another attack was reported at a Gazprom-owned refinery.

A Ukrainian drone attack has reportedly forced the closure of a Yandex data centre in Russia’s Ryazan region, causing a fire and disrupting part of the company’s infrastructure. Shares in the Russian technology group fell by more than three per cent in early Moscow trading on Thursday, 8 October.

The installation in Sasovo was affected during overnight strikes on Russian territory. Yandex said it was working to restore affected infrastructure, while its principal consumer services remained operational. The incident has raised questions about the vulnerability of Russia’s digital economy to Ukraine’s long-range strike campaign.

Fire at Sasovo technology facility

The affected data centre began operating in 2014 in buildings formerly occupied by the Sasta machine-tool manufacturing plant. Yandex subsequently connected the installation to Moscow by fibre-optic communications links as part of its wider computing infrastructure.

Ryazan regional governor Pavel Malkov said Russian air defences intercepted two drones over the region. He reported a fire on the roof of an industrial building in the Sasovo district and damage to windows in nearby private homes. No casualties were reported.

According to a statement on the incident, the situation had been brought under control while work to restore infrastructure continued. Yandex said its main consumer services remained operational.

The company’s cloud division also reported an electricity supply problem affecting an availability zone known as ru-central1-b. Clients were advised to use alternative zones where necessary to maintain service continuity.

Yandex shares decline

Yandex shares dropped by approximately 3.4 per cent to 3,568.5 roubles in early trading on the Moscow Exchange. The decline followed news of the fire, although a single trading session cannot establish the long-term financial cost of the disruption.

Yandex operates search, advertising, navigation, artificial intelligence and cloud computing services. Its infrastructure therefore supports commercial users as well as the company’s own applications. The duration of the interruption, the extent of physical damage and the cost of repairs will determine the wider impact.

Investors can follow the company’s quoted share price as further details emerge.

Gazprom refinery also reportedly targeted

In a separate development, explosions and a fire were reported on Thursday near the Gazprom Neftekhim Salavat refining and petrochemical complex in Russia’s Republic of Bashkortostan, around 1,400 kilometres from the Ukrainian border. The precise location of the fire and the extent of damage had not been independently established.

The Gazprom-owned complex processes hydrocarbon feedstock and produces petrol, diesel, fuel oil and petrochemicals. It has previously been targeted by Ukrainian drones. The latest reported incident comes amid repeated attacks on Russian refining and fuel infrastructure.

Russia’s technology sector faces new risks

Ukraine’s long-range economic campaign has focused heavily on oil refineries, fuel stores, military production plants and transport infrastructure. A strike affecting a major data centre introduces another category of vulnerability: the computing equipment and supporting utilities used by the digital economy.

Such sites serve businesses, financial institutions and industrial enterprises, and can also support defence-related activities. However, no publicly verified evidence establishes that the Sasovo data centre was directly involved in Russian military operations.

Damage to power supplies, cooling systems and network connections can interrupt services without necessarily destroying servers. Operators with geographically distributed facilities may be able to shift workloads to unaffected locations. The suspension of one centre therefore does not mean that Russia’s internet infrastructure has ceased functioning.

Economic pressure on Moscow

The attacks coincide with Russia’s plans for substantial military expenditure in 2027. The draft federal budget envisages considerable government spending and borrowing as Moscow continues its war against Ukraine.

Ukraine’s strikes on economic infrastructure are intended to increase the cost of maintaining Russia’s invasion. Disruption to energy facilities can affect fuel production and revenue, while attacks on technology and industrial sites may interrupt wider commercial and logistical operations.

The cumulative effect depends on the severity and duration of the damage. Neither the reported temporary closure of the Yandex facility nor preliminary accounts of the Salavat fire establish the scale of lasting losses.

The incidents nonetheless illustrate the exposure of Russian industrial and technology assets far beyond the Ukrainian border, as Kyiv increasingly targets infrastructure that supports the country’s economy.

A large fire has broken out at the Volodarskaya petroleum-products station outside Moscow following an extensive overnight drone attack. The facility occupies an important position in the pipeline network supplying petrol, diesel and aviation fuel to the Russian capital and its principal airports.

A major fire was reported at the Volodarskaya linear production and dispatch station in Moscow region early on Tuesday, bringing Ukraine’s campaign against Russian fuel infrastructure to another important point in the capital’s supply network.

Footage published from the area around Konstantinovo showed a substantial blaze at the facility, with reports from local residents that storage tanks were burning. The material identified the site as the Volodarskaya station, operated by Transneft-Upper Volga and connected to the petroleum-products network serving the Moscow region.

The extent of the damage was not immediately clear. There had been no detailed assessment from Transneft by Tuesday morning establishing whether pumping equipment, pipelines or only storage facilities had been affected. This distinction will determine whether the attack produces a temporary disruption or a more significant problem for Moscow’s fuel distribution system.

The strike formed part of a large overnight drone attack on Moscow and surrounding districts. Moscow Mayor Sergei Sobyanin reported repeated interceptions of drones approaching the capital, while air-defence activity continued across Moscow region. Russian aviation authorities temporarily restricted operations at Vnukovo, Domodedovo, Sheremetyevo and Zhukovsky airports for flight-safety reasons.

There is no evidence at this stage that the airport restrictions resulted from fuel shortages. They were imposed during the drone attack itself. The longer-term significance of Volodarskaya lies instead in the station’s role within the pipeline and storage infrastructure serving the Russian capital.

A major link in Moscow’s fuel network

Volodarskaya is connected to Moscow’s ring petroleum-products pipeline, through which petrol, diesel and aviation kerosene can be moved between refineries, storage facilities and major consumers.

Its importance is documented by Transneft itself. In 2024, the company said it had returned a 32-kilometre petroleum-products pipeline between the Moscow refinery and Volodarskaya to operation as part of a project to increase fuel deliveries across Moscow region.

According to the company’s figures, the project allowed aviation-fuel deliveries to Moscow’s airports to rise almost twofold, to as much as three million tonnes a year. Potential diesel deliveries to Moscow region consumers increased to 2.8 million tonnes annually, while petrol volumes reached 1.6 million tonnes. Transneft specifically identified Vnukovo, Domodedovo and Sheremetyevo as airports supplied through the expanded system.

Transneft has also expanded storage at Volodarskaya. The company previously said it had commissioned additional petroleum-product tanks at the station to support fuel supplies to Moscow and aviation-fuel transportation to the capital’s airports.

Those figures do not mean that every litre of fuel consumed by Moscow depends on Volodarskaya. Russia can move petroleum products by rail and road, and the Moscow region has other storage and distribution facilities. But replacing pipeline volumes on the scale handled by the Moscow system would place additional demands on those alternatives, particularly if disruption were prolonged.

The attack also follows repeated Ukrainian strikes against refining infrastructure supplying European Russia. On 20 September, EU Today reported that a mass drone attack had hit the Moscow Oil Refinery at Kapotnya, one of the main fuel-processing plants serving the capital. The strike reportedly affected its ELOU-AVT-6 primary processing unit, increasing pressure on a refinery that had already been targeted earlier in the year.

The broader campaign has moved beyond individual refineries. Ukraine has increasingly targeted different stages of Russia’s energy system, including storage depots, pumping infrastructure, ports and export terminals. Earlier attacks on the Omsk refinery and Baltic export infrastructure illustrated Kyiv’s effort to put pressure on both domestic fuel processing and the logistics through which Russian oil reaches international markets.

That approach is intended to force Russia to repair several parts of the system simultaneously rather than simply compensate for the temporary loss of production at one refinery. EU Today has previously examined how sustained strikes can put physical pressure on Russia’s oil economy where sanctions alone have limits.

President Volodymyr Zelenskyy said on 3 October that Ukraine intended to intensify attacks on Russian oil refineries in response to Moscow’s continuing strikes against Ukrainian cities, while maintaining that Ukrainian operations would not deliberately target civilians.

Volodarskaya adds another element to that campaign. A refinery converts crude oil into usable fuels; a pumping and storage station determines how those products reach consumers. Damaging one without the other may create disruption that can be bypassed. Sustained damage to both processing and distribution infrastructure is more difficult to compensate for.

Much therefore depends on what happened inside Volodarskaya overnight. If the damage is confined to several storage tanks, the Moscow fuel network may be able to absorb the loss. Damage to pumping installations or pipeline connections would have wider consequences, particularly if the facility is attacked repeatedly.

The strike nevertheless demonstrates that a fuel installation closely connected to Moscow’s aviation and transport system can be reached despite the dense air-defence network surrounding the capital. The scale of its effect will become clearer once satellite imagery and operational information show which parts of the Volodarskaya complex were actually damaged.