June 2 (Reuters) - Russia's Ilsky oil refinery in the southern Krasnodar region caught fire after a drone attack, local authorities said on the Telegram messaging app on Tuesday.

There were no casualties, according to preliminary information, the authorities said.

The Ilsky refinery, with an annual processing capacity of 6.6 million metric tons of oil, or 133,000 barrels per day, is export-oriented.