At least one person was killed in the northwestern Leningrad region as a barrage of Ukrainian drones struck and set fire to one of Russia’s largest oil refineries, local authorities said on Monday.
Leningrad region Governor Alexander Drozdenko said drone debris fell onto the roof of an apartment building in the town of Vsevolozhsk, located directly northeast of St. Petersburg, killing a woman who resided on the top floor. He said the rest of the building’s tenants were safely evacuated.
News of the death came shortly after Drozdenko said that Ukrainian drones targeted an industrial area in the Kirishky district, which is home to the Kirishinefteorgsintez oil refinery, Russia’s second-largest refinery. He did not report any damage or injuries.
Kirishinefteorgsintez is a subsidiary of the oil and gas company Surgutneftegaz. In 2024, the facility was estimated to have processed nearly 7% of Russia’s total oil refining volume, or 350,000 barrels per day.
Ukraine has attacked the refinery multiple times over the past year. In October 2025, a Ukrainian strike on the facility reportedly forced it to shut down its main unit, which accounted for around 40% of processing capacity.
Russia’s Defense Ministry said it intercepted 430 Ukrainian drones across Russia and annexed Crimea between Sunday night and Monday morning.
The Defense Ministry also reported striking three power substations in Ukraine overnight, as well as a cargo ship it claimed was transporting weapons to the Ukrainian armed forces.
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