An oil refinery in Russia's southern Volgograd region caught fire after an overnight Ukrainian drone attack, but the blaze has now been put out, the regional governor said on Friday.
Andrei Bocharov, the governor, said in a statement on the Telegram messaging app that Russian air defences had repelled an attack on his region by eight drones.
"As a result of falling debris from one of the drones, a fire broke out on the territory of an oil refinery, which was promptly extinguished. One injured refinery worker was hospitalised," he said.
Andriy Kovalenko, the head of Ukraine's Centre for Countering Disinformation, said on Telegram that the Volgograd oil refinery, which he described as one of Russia's largest, had been struck.
SHOT, a Russian news outlet with contacts in the security services, said four Ukrainian drones had been destroyed over a second refinery in Yaroslavl, northeast of Moscow.
Ukraine has carried out frequent air attacks on Russian refineries, oil depots and industrial sites in an attempt to cripple key infrastructure underpinning Russia's war effort.
