A man was killed and three other people, including a child, were injured in Ukrainian drone attacks on Russia’s Volga region of Samara, regional Governor Vyacheslav Fedorishchev said on Sunday.
Residential buildings and an industrial facility were damaged in the attacks, Fedorishchev said on Telegram, without providing further details.
The independent Russian news outlet Astra, citing images and videos circulating on social media, reported that the industrial site was the Syzran oil refinery.
Footage showed several large fires burning at the facility.
The Russian military said Sunday morning it shot down 349 Ukrainian drones overnight, a scale of attack comparable to those seen in recent days.
Ukraine has targeted the Syzran refinery several times. Following a previous attack in late May, the plant, which has an annual processing capacity of around 8.5 million tons, was forced to suspend operations.
The refinery, owned by state-controlled oil company Rosneft, produces petrol, diesel and kerosene.
Russia is facing a fuel shortage as repeated Ukrainian strikes on its oil refining infrastructure have disrupted production.
Petrol stations have begun rationing fuel, with motorists often facing long queues to obtain supplies.
Kiev has pursued the campaign for months in an effort to pressure Russian President Vladimir Putin, who ordered the full-scale invasion of Ukraine more than four years ago, into negotiations.
Moscow has said that any peace agreement must include the transfer of Ukrainian territory, including areas that Russian forces have still not captured more than four years after the invasion began.
