MOSCOW: A fire broke out at an oil refinery in southern Russia following a droke attack by Ukraine, a Kremlin-appointed official said on Sunday.

The night-time raid in the Volgograd region was repelled by the Russian air defences, Governor Andrey Botsharov wrote on Telegram.

However, the falling drone detonated and caused a fire on the refinery site, which has since been extinguished. There were no casualties, the governor said.

Moscow has been waging a full-scale war against Ukraine for more than two years.

To disrupt Russia's infrastructure and reduce its war revenues, the Ukrainians have, in turn, repeatedly targeted oil refineries hundreds of kilometres deep inside the country.