A fire at Lukoil PJSC’s refinery in Volgograd blamed on a downed drone was extinguished early Saturday in the latest attack by Ukraine on a Russian energy facility.

“Last night, air defense and electronic warfare systems repelled a UAV attack on the territory of the Volgograd region,” Andrey Bocharov, the region’s governor, said in a statement on Telegram. “As a result of the consequences of the downed UAV, a fire broke out at the Volgograd refinery.”

The oil-product spill blaze was “completely” extinguished at 7:55 a.m. local time, according to the regional emergencies ministry. There were no casualties, it said in a website statement.

In recent weeks, several Russian oil-processing and storage facilities have been targeted or damaged in what appeared to be Ukrainian drone attacks. As the war between the two countries is soon to enter a third year, Ukraine is focusing on targets that provide revenue to the Russian state and supply fuel to the Russian army.