Ukrainian drones from SBU struck Ust-Luga and Primorsk in Leningrad Oblast, causing substantial fires.

SBU drones caused substantial fires at Ust-Luga and Primorsk March 26-27

Ukrainian forces struck the Kirishi oil refinery in Leningrad Oblast, setting fire to primary oil refining plants and two tanks.

The refinery had halted all operations after a Ukrainian drone attack caused a fire there.

just days later, on March 26, so did Kinef in Kirishi, in the Leningrad region, one of the country’s largest refineries; it still is not operating at full capacity, following a subsequent strike.

Ukrainian drones hammered major Russian refinery in Leningrad Oblast for second night in a row

More than 20 Ukrainian drones struck Russia's Leningrad Oblast overnight on March 26, damaging industrial infrastructure near one of the country's largest oil refineries

The site was identified as the Kirishinefteorgsintez (Kirishi Petroleum Organic Synthesis, or KINEF) refinery – Russia's second-largest by processing capacity

The plant refines up to 20 million tons of oil annually, producing fuel and petrochemicals critical to domestic supply and export flows

Ukrainian deep-strike units including USF "Ptakh" and SSU carried out drone strikes on the Kirish Oil Refinery on March 26, 2026.