An apparent drone strike started a fire at a fuel storage facility in the Crimean port city of Sevastopol on Saturday, the Moscow-installed governor there said.
The fire was still burning but it had been contained and no one was injured, Mikhail Razvozhaev said.
"The four fuel tanks that were hit, they are practically burnt out already," he said in a video posted on his Telegram channel.
Sevastopol, on the Crimean peninsula that Russia annexed from Ukraine in 2014, has come under repeated air attacks since Russia invaded the country as a whole in February 2022.
Russian officials have blamed the attacks on Ukraine.
A Ukrainian military intelligence official said more than 10 tanks of oil products with capacity of around 40,000 tonnes were destroyed, RBC Ukraine reported.
The official, Andriy Yusov, did not claim Ukraine was responsible for the explosion.
Israeli airstrikes kill eight people on highway south of Beirut
Israel steps up attacks on Gaza since Iran truce, as military says Hamas rearming
Trump says he does not need China's help to end Iran war
India's Modi cuts size of his motorcade to save fuel, source says
Series of tremors near Tehran renew concerns over major quake risk
Ukraine's Zelenskyy warns of incoming Russian drone attacks during daylight
10 islanders flown to UK for precautionary isolation after hantavirus outbreak
US war in Iran has cost $29 billion so far, Pentagon says
