Parts of Russia's Omsk refinery were seen burning on Monday after Ukraine's drone strikes. SOCIAL MEDIA via REUTERS New variants of Ukraine's long-range strike drones hit an oil refinery in Siberia. The 1,700-mile strike is Ukraine's longest-range drone attack on Russia since the war began. Online footage showed a fire at a key processing unit of the Omsk facility, Russia's largest refinery. Ukraine struck Russia's largest oil refinery, located in the city of Omsk, on Monday, marking what its