Ukrainian drones forced Rosneft's Kuybyshevsky oil refinery in Samara Oblast, Russia, to halt oil processing on 10 June, Reuters reported. The strike puts all three plants in the Rosneft Samara refining hub out of full operation at the same time.

Reuters confirms processing halt at both primary units

Reuters cited two industry sources to confirm that processing stopped at both AVT-4 and AVT-5 after the strike. Each unit has a nominal processing capacity of about 73,000 barrels of crude oil (10,000 metric tons) per day. The hits caused damage and subsequent fires at both. 

Samara Oblast Governor Vyacheslav Fedorishchev claimed a massive overnight drone attack injured three people and caused "damage to several industrial facilities." 

An earlier report on 10 June described fires at the Kuybyshevsky refinery after the strike.

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Fire reported at Kuibyshev oil refinery in Russia’s Samara after drone strike

Plant size and output

Kuybyshevsky's 2024 crude oil throughput was 4.7 million tons, equal to 94,400 barrels a day, Reuters reported. That year's output included 0.8 million tons of gasoline, 1.4 million tons of diesel, and 1.3 million tons of fuel oil. Nominal capacity stands at 7 million tons per year. The plant is one of the largest oil refining facilities in the Volga region. It also supplies fuel for the Russian army.

The Kuybyshevsky plant was also previously hit in January 2026, August 2025, and in March 2024. The earlier strikes damaged equipment and forced production cycles to stop.

Same night: Cheboksary defense plant struck

The same night, Ukrainian forces also struck the VNIIR-Progress plant in Cheboksary, Chuvashia, which was previously hit on 5 May. The factory makes "Kometa" antennas that protect Russian drones from electronic warfare. It also makes satellite receivers for GLONASS, GPS, and Galileo systems. Ukraine's General Staff said such modules are used in Shahed-type drones, Iskander and Kalibr missiles, and aerial bombs.

Meanwhile, today saw a strike on the Afipsky refinery in Krasnodar Krai. 

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Afipsky oil refinery burns again as Ukrainian drones return to Krasnodar Krai

By May 2026, Ukrainian drones had taken six of ten Russian refineries hit during that month offline. Russian media counted 24 of Russia's 33 largest refineries struck since 2022. Only the Omsk and Angarsk plants east of the Urals remain untouched so far.

Ukrainian drones struck the Afipsky oil refinery in Russia's Krasnodar Krai overnight on 11 June, sparking a fire later extinguished, according to the Krasnodar Krai operational headquarters. The southern Russian plant, repeatedly targeted by Ukrainian strikes, supplies fuel to the Russian military.

A blaze at one of southern Russia's largest refineries

The Ukrainian Telegram channel Exilenova+ posted footage from local witnesses showing air defense fire and a blaze. The attack started after midnight, with residents reporting drone overflights and explosions at intervals of a few minutes. 

Krasnodar Krai authorities claimed drone "debris" fell in the village of Afipsky and set the refinery on fire — Moscow's standard framing for Ukrainian strikes on Russian energy targets. The fire was out by 07:32 Moscow time, the operational headquarters later stated. Russian authorities reported no casualties at the plant itself.

The plant runs two primary oil distillation units with capacities of 9,786 and 8,829 tons per day. It is export-oriented and does not currently produce gasoline or diesel for Russia's domestic market. Combined throughput at the Afipsky plant and the affiliated Krasnodar refinery reached 7.2 million tons in 2024. Another 3 million tons were processed in the first half of 2025.

Third strike on Afipsky in 2026 amid wider drone campaign

Russia's Defense Ministry claimed its air defenses intercepted and destroyed 330 Ukrainian drones over Russian territory overnight, the Moscow Times reported. According to the ministry, drones were spotted over Bryansk, Kursk, Belgorod, Oryol, Smolensk, Kaluga, Tula, Tver, Vladimir, and Moscow oblasts, as well as Krasnodar Krai and occupied Crimea. Russian aviation regulator Rosaviatsia restricted operations at airports in Tambov, Krasnodar, Sochi, Gelendzhik, and Zhukovsky outside Moscow.

The 11 June raid was the third attack on the Afipsky refinery this year, following hits on 21 January and 14 March. During the March hit, drones damaged the AT-22/4 primary oil processing unit at Afipsky — the plant's refining starting point. Satellite imagery had previously confirmed structural damage from a November 2025 drone attack.