A fire broke out early Sunday at an oil depot in Russia's Black Sea resort city of Sochi after a Ukrainian drone attack, the regional emergency response headquarters said.

The agency said that one fuel tank containing 2,000 cubic meters of petroleum products was engulfed in flames.

Sochi Mayor Andrei Proshunin confirmed the incident on social media, saying that emergency services were actively working at the site.

"In the Adler district, drone debris fell into a tank with oil products, causing a fire. Firefighting efforts are already underway. A total of 127 personnel and 35 pieces of equipment are on the scene," he said.