Read also: Fire erupts after several drones strike oil depot in Russia’s Krasnodar Krai – video “Russia was ‘rumbling’ again on the night of May 11,” HUR stated. “The Volgograd refinery, owned by Lukoil-Volgogradneftepererabotka, got an unexpected visit from our UAVs.” Intelligence sources indicated that primary refining units AVT-1 and AVT-6 were affected, and the exact extent of the damage is still being assessed. Additionally, a control cable for air refrigerators was destroyed, shutting down seven of them. The chimney of the P-1 furnace was also hit. Russian media reported that air defense…