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.

More than 50 Russian companies could default on their bonds this year, the most since 2009, a rating-agency analyst told Russian newspaper Izvestia, which reported it on 6 October.

Russia's wartime economy is straining under high interest rates, and the budget is too: the 2026 deficit has nearly doubled from the earlier forecast to a record $88 billion, with more deficits planned for the next three years as Moscow raises taxes to fund the war and plans its biggest defense budget since the full-scale invasion began.

A default is a situation in which a company cannot make promised interest payments to investors on time or repay borrowed money. If a payment is not made by the agreed deadline, the company becomes delinquent, which under certain conditions is recognized as a default.

So far this year, 20 companies have defaulted for the first time, compared with 24 in all of 2025, said Mikhail Nikonov of the Expert RA rating agency. Most of the companies that missed payments are small issuers of high-yield bonds, Izvestia reported.

In 2026, Russian companies have missed payments totaling 41 billion rubles (about $490 million), compared with 34 billion rubles (about $410 million) the previous year, according to investment bank Sinara.

Russia faces a new wave of corporate defaults

By the end of 2026, the number of Russian companies unable to service their ruble-denominated debt on time could reach 40–50, the highest level since 2010, said Pavel Zholobov, junior managing director at the NRA rating agency.

The number of bond defaults in 2026 has already reached its highest level in a decade, Zholobov said. Similar figures were recorded in the mid-2010s: in 2014, 35 companies missed payments; in 2015, 52 did so; and in 2016, there were 44 issuers. This occurred in part after Western sanctions were imposed on Russia over its annexation of Crimea and its war in Donbas, as well as amid a halving of oil prices and a sharp weakening of the ruble.

There were more defaults only in 2009. At the time, amid the fallout from the global financial crisis, more than 100 issuers faced payment problems, while the volume of distressed debt reached nearly 200 billion rubles, Zholobov noted.

High interest rates put pressure on companies

This time, the main reason for companies' difficulties in making bond payments has been the prolonged period of high interest rates, which has continued since 2023. Companies are raising financing at high interest rates but are unable to refinance their debt on more favorable terms, explained Ekaterina Sidorova, head of the Foreign Exchange, Commodities and Debt Markets Department at SberCIB Investment Research.

At the same time, the situation does not yet resemble a systemic debt crisis: defaults are primarily being recorded among companies with low credit ratings and high debt burdens, Sidorova said.

If a company fails to repay bond debt, it is given 10 business days to meet its obligations. If it fails to do so, the company may offer investors a restructuring—for example, by postponing payments in exchange for a higher interest rate.

The number of defaults will remain high in 2027, Sidorova believes.

High interest rates were a response to accelerating inflation in Russia. Domestic demand was outpacing production, Russia's Central Bank said in October 2023. Sanctions over the war and rising defense spending had also hit the economy and the ruble, which had lost about 25% against the dollar that year. The bank raised its key rate from 7.5% in the first half of 2023 to 15% by the fall.

Ukraine targets Russia's oil industry to weaken its war economy

Ukraine is also seeking to weaken Russia's economy as part of efforts to reduce its ability to finance the war. In particular, Defense Minister Yevhenii Khmara said strikes on oil refineries are aimed at "bleeding the Russian war machine" and destroying its military and economic potential. According to the ministry, the attacks have knocked out more than 51% of Russia's oil refining capacity.

In the first half of July, Russian oil refineries processed about 3.9 million barrels of oil per day—the lowest level since March 2005. Due to the production cuts, Moscow was also forced to restrict fuel exports.