The reported strike comes two nights after Ukrainian forces launched a joint attack against the refinery that allegedly damaged multiple on-site facilities.

Ukrainian drones hit a Russian oil refinery in the city of Ryazan overnight, causing a fire and damaging equipment at one of Russia's biggest refineries, four industry sources told Reuters on Friday.

Four Ukrainian drones hit Russia's Lukoil refinery early Wednesday morning causing fires and significant damage, according to Ukraine's military intelligence. It comes days after Russia's Ryazan oil refinery was hit.