Ukraine's military struck two Russian oil distribution facilities in the Bryansk and Samara regions overnight, Kyiv's general staff said on Tuesday.
In Samara, the military hit a line production station that mixes Russian oil for its flagship Urals oil grade for export, the general staff said on Telegram, Reuters reported.
In Bryansk, it hit a line production station of a pipeline critical for Russian army supplies, it said.
"The extent of the damage is being determined," it added.
Ukraine has in recent weeks renewed its campaign of long-range drone attacks on Russian oil production sites, systematically targeting key facilities to try to reduce Moscow's export revenues and frontline supplies.
The Russian defence ministry said on Telegram that its units destroyed Ukrainian drones over Bryansk and Samara. There was no immediate comment from Russia issued publicly.
Kyiv's troops also hit a military airfield in Russia-occupied Crimea, Ukraine's general staff said, adding that two planes were hit.
