Drones struck a plant making fuel components for Russia's Kh-101 cruise missiles and a second Yandex data center overnight on 9 October, Russian officials and monitoring channels reported. The same night, fires were reported at a refinery in Russia's far north and an oil depot near Belgorod. Russia claimed it downed more than 500 drones, and Ukraine has not claimed any of the strikes.

Ukraine has spent months hitting refineries and arms suppliers deep inside Russia. Russia, meanwhile, keeps firing Kh-101 cruise missiles at Ukrainian cities, including the one that killed 22 people in Pryluky on 7 October.

The plant behind the Kh-101's fuel

The Redkino Experimental Plant in Tver Oblast came under attack overnight, Ukrainian monitoring channel Exilenova+ reported. It said the plant makes components of Decilin-M, a fuel for Kh-55 and Kh-101 cruise missiles, as well as additives for diesel and aviation kerosene.

Tver Oblast Governor Vitaly Korolev claimed a plant in Redkino caught fire as a drone attack was being repelled. He did not name the plant. No workers were hurt, he said.

The plant also makes ferrocene derivatives, which serve as burn catalysts in solid-fuel rocket motors, Militarnyi reported. The UK sanctioned it in September 2025. Drones attacked it in September 2023 and twice in one night in June 2024, the outlet said.

In February, drones of the Security Service of Ukraine's (SBU) Alpha unit struck the plant, sparking a large fire, SBU sources told Kyiv Post. The Kh-101 is the missile Russia used against Pryluky on 7 October, Ukrainian President Volodymyr Zelenskyy said.

Yandex loses a second data center

Part of Yandex's data center in Kaluga was damaged in the drone attack, and several modules were completely knocked out, the company's press service told Interfax, Russian newspaper Kommersant reported. Some Yandex services may run with interruptions, no one was hurt, and the company is still assessing the damage, Yandex said.

Kaluga Oblast Governor Vladislav Shapsha claimed nine people were injured in the overnight attack on the region. A day earlier, a drone attack forced Yandex to fully shut its data center in Sasovo, Ryazan Oblast.

A refinery in the north, a depot near Belgorod

Locals reported an attack on the Ukhta refinery in the Komi Republic, followed by a fire, Exilenova+ said. The Lukoil-owned plant can process about 4.2 million metric tons of oil a year, making gasoline, diesel, fuel oil, and vacuum gasoil. The extent of the damage is unclear.

An oil depot north of Belgorod was also burning after the night's attack, the channel posted. Belgorod's regional headquarters claimed two people were killed and four injured, including a child, in the Belgorod district.

A large fire also broke out in Pushkino near Moscow, likely at a truck parking lot, Astra reported. The cause is unknown.

Repeated strikes on Redkino target a specialty fuel that Russia's cruise missiles depend on, while two Yandex data centers hit in two nights bring the war to services ordinary Russians use every day.

A drone attack overnight on 8 October caused a fire that hit part of Yandex's data center in Sasovo, Ryazan Oblast, about 580 km from Ukraine, and the site is fully stopped, the Russian tech company told Russian media. The data center sits on the grounds of Sasta, a sanctioned machine-tool plant, Russian outlet Astra said, citing Wikimapia data. Astra's OSINT analyst found from eyewitness footage that the fire hit the plant.

Since late September, Russia has been striking data centers in Kyiv that keep Ukraine's internet and online services running. Now a drone attack has stopped one of the data centers that Russia's largest tech company relies on.

Yandex counts the damage

Yandex warned that some services may be unavailable, while its core services kept running and no one was hurt. Ryazan Oblast Governor Pavel Malkov claimed two drones were downed, a roof caught fire at an enterprise in the Sasovo district, and windows were blown out in several homes.

The power failure took down a wide range of Yandex Cloud infrastructure, including computing capacity, networks, data storage, databases, Kubernetes, cloud services, AI, and security and monitoring systems, Ukrainian outlet ZN.ua reported, citing Exilenova+.

Ukrainian monitoring channel Exilenova+ reported that the plant was hit, without naming an attacker. The channel said Sasta, which claims a place on Russia's register of defense-industry companies, makes computer-controlled machine tools, including five-axis machining centers, and previously supplied the Tactical Missiles Corporation (KTRV) and Roscosmos. The plant's value to the arms industry lies in machines that cut precision parts, not in finished weapons, the channel said.

Citing Exilenova+, Militarnyi reported that Ukraine's Defense Forces hit the plant. It also linked Sasta to Iskander missile supply chains. No source has said whether the plant or the data center was the target, and no Ukrainian official has claimed the Sasovo strike. Sasta has been under US sanctions since November 2023, UK sanctions since February 2024, and Ukrainian sanctions since April 2025, a sanctions database shows.

Salavat: Kyiv reports a hit

Ukrainian forces hit the Gazprom Neftekhim Salavat complex in Bashkortostan, about 1,380 km from the front line, causing a fire, Ukraine's General Staff said. It said the complex processes up to 10 million metric tons of hydrocarbons a year and serves Russia's armed forces. Its key unit, the ELOU-AVT-6 primary oil refining unit launched in 2012, can process 6 million metric tons a year, Militarnyi reported. Astra's analyst placed the fire a few kilometers outside Salavat, possibly near the refinery.

Salavat Mayor Marat Zagidullin claimed that debris from several drones fell in the industrial zone that morning and started a fire.

"The enterprise continues to work," he said.

Astra noted earlier hits on the complex on 24 September 2025, on 14 July 2026, when refining fully stopped, and on 13 August 2026.

Russia's strikes on Ukraine's data centers

Russia has repeatedly hit data centers in Kyiv since 23 September. Strikes hit the COSMONOVA data center twice, the second time knocking it out, and the Parkovyi data center stopped working completely on 1 October after a series of strikes. In early October, Russia destroyed the dline.ua data center in Kyiv.