A senior official claims that Ukrainian long-range drones have struck one of Russia’s biggest oil refineries for the second time in three days.

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.

Ukrainian drones struck more Russian oil and gas facilities, the latest in a near-daily series of attacks meant to hurt Moscow’s war effort.

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

A Russian oil refinery and gas processing plant went up in flames after Ukraine fired dozens of drones over the border Sunday night, officials say. Shocking video from Russia’s Astrakhan region shows a large fire engulfing the Astrakhan Gas Processing Plant,

Ukraine struck energy facilities in southern Russia with dozens of drones on Monday, triggering fires at a major oil refinery and gas processing plant and disrupting flights from the Volga to the Caucasus Mountains,

A Ukrainian drone attack sparked a fire at an oil depot in Russia’s Krasnodar region, the area’s governor said Wednesday. The fire, which was later put out, happened in the village of Novominskaya. Krasnodar Governor Veniamin Kondratyev said debris from a destroyed drone caused the fire,

The fire at the Albashneft oil depot was extinguished at 8:11 am Moscow time, the independent Telegram channel Astra reported, publishing a video of what appears to be a burning oil tank.