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 struck an oil refinery in Russia’s southern Volgograd region as part of larger overnight drone attacks, Russian media reported early Monday. The aerial attacks targeted an oil refinery in the Volgograd region,

Videos showed fireballs over a facility in Ryazan, 110 miles southeast of Moscow. Kyiv is seeking to disrupt Russian military logistics and put pressure on the country’s economy by striking its oil industry.

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.

Russia’s ability to keep making fuel at the normal pace is looking increasingly precarious following a surge in Ukrainian drone attacks on the nation’s oil refineries, including a fresh incident on Friday.

A series of drone attacks by Ukraine on Russia's energy facilities have sparked fires in recent days at a major oil refinery in the Volgograd region, as well as at the Astrakhan gas processing plant.

In December, Ukrainian drones targeted oil depots and refineries in Smolensk, Oryol, Bryansk and Rostov — an area that had previously been targeted in July. The General Staff of Ukraine’s Armed Forces claimed that the July attack on the Rostov refinery destroyed 1.5 million tons of oil and oil products worth $540 million (£433m).

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