A Ukrainian drone attack overnight sparked a fire at an oil depot in Russia's southern region of Krasnodar that has since been extinguished, regional officials said on Wednesday. A series of drone attacks by Ukraine on Russia's energy facilities have sparked fires in recent days at a major oil refinery in the Volgograd region,

Akhtarsk in Russia's Krasnodar Krai on the night of 5-6 February, from where the Russians have launched Shahed kamikaze drones to strike Ukrainian cities.

Ukraine has launched its second major drone attack in a week against Russian oil refineries hundreds of miles from its borders.