Ukraine’s military struck the Kirishi oil refinery in Russia’s Leningrad Region, known as Kinef, forcing it to shut down, the Reuters news agency reported, citing sources.
Three of the refinery’s four primary oil processing units were damaged in the drone strikes, the sources said. They could not say how long repairs would take.
Surgutneftegas, the Russian oil company that owns Kinef, has not commented on the attack.
Kinef is the largest oil refinery in the European part of Russia and the second-largest nationwide, after the Omsk refinery. In 2025, Kinef processed 18 million tons of oil, accounting for about 7 percent of Russia’s total output.
Since the start of the full-scale war, Ukrainian drones have repeatedly targeted Kinef. The last major attack, which partially disrupted operations, took place on March 26, 2026.
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