Aug 13 (Reuters) - Debris from destroyed drone sparked a

small fire that was promptly extinguished at the Slavyansk oil

refinery in the Krasnodar region, the administration of the

region in Russia's south said on Wednesday.

"There are casualties reported," the administration said on

the Telegram messaging app. "The fire was promptly extinguished.

Emergency and special services are working at the scene."

Slavyansk refinery is a private plant with a capacity of

around 100,000 barrels per day. It supplies fuel for both

domestic use and export.