The Kuibyshev oil refinery in Samara Oblast halted oil processing after a drone attack on June 10. According to Reuters, citing two sources in the oil and gas industry, both crude oil distillation units were shut down — each with a capacity of approximately 10,000 tons, or 73,000 barrels per day.

But the more important context is not the plant itself, but the group it belongs to.

The Samara Group: Three Plants, Three Strikes

The Kuibyshev Oil Refinery is part of Rosneft's Samara Group along with the Novokuibyshevsk and Syzran refineries. All three have already suffered strikes in 2025. Novokuibyshevsk was attacked on August 2, Syzran was disabled by a strike on August 15 — and at the time of the next strike on Kuibyshev, it was still not operational. In effect, all of Rosneft's regional oil refining infrastructure in Samara Oblast is simultaneously under attack or shut down.

The annual capacity of the Kuibyshev Oil Refinery is 7 million tons, accounting for approximately 2.5% of total Russian refining. According to Ukraine's Security Service, the plant produces over 30 types of petroleum products.

Not the First Time — and Not the First Shutdown

The Kuibyshev Oil Refinery had already been attacked in January and April 2025. Following the April strike, the enterprise temporarily suspended operations and underwent repairs. The current strike was delivered by DeepStrike drones — Ukrainian long-range strike unmanned aerial vehicles.

"As a result of DeepStrike drone strikes on the refinery's territory, explosions occurred and a fire broke out. Detailed consequences of the damage are being clarified"

— Security Service statement after the June 10 attack

What This Means for Russian Fuel Logistics

Samara Oblast is not just geography. It is a hub through which petroleum products are supplied to central and southern regions of Russia. Systematic strikes on oil refineries have already undermined the country's fuel logistics: by various estimates, in 2025 drones have attacked Russian oil refineries at least 80 times, disabling approximately 20% of production capacity.

• Kuibyshev Oil Refinery — shut down (June 2025, third attack in a year)
• Syzran Oil Refinery — not operational after the August 15 strike
• Novokuibyshevsk Oil Refinery — attacked on August 2

Rosneft has not officially confirmed the scale of the shutdown — the company did not respond to Reuters inquiries.

If the Samara Group does not resume operations by fall — regions dependent on its products will face fuel shortages just as the heating season approaches. The question is whether Rosneft will have time to repair all three plants simultaneously, lacking both equipment due to sanctions and time before the next strike.