Ukraine Drones Knock Out Russia's Kirishi Oil Refinery — 7% of Russian Refining Capacity Halted in Leningrad Oblast Strike

Ukrainian drones struck Russia's Kirishi oil refinery in Leningrad Oblast on May 5, 2026, forcing the facility to halt all processing operations. The Kirishi refinery — located approximately 100 km southeast of St. Petersburg — is Russia's second-largest oil refinery with a capacity of approximately 400,000 barrels per day, representing roughly 7% of Russia's total refining output. Drone strikes damaged three of four primary crude distillation units and several secondary processing units. A nearby fuel pumping station serving the Baltic port of Primorsk was also hit. The refinery issued an emergency shutdown and evacuation orders. The attack was part of a coordinated May 5 strike campaign by Ukraine that also included the Flamingo missile strike on the Cheboksary defense plant and a 289-drone barrage across multiple Russian regions. Ukraine has now struck Russian oil infrastructure more than 20 times in 2026, reportedly inflicting over $7 billion in losses. The Kirishi shutdown came just days after Ukraine's fourth strike on the Tuapse refinery (May 1) had already pushed Russia's average processing capacity to a 16-year low.