"Overnight, air defenses and electronic warfare systems repelled a UAV attack on the territory of the Volgograd Region," he said on Telegram.
"As a consequence, one drone fell and set off a fire at the Volgograd oil refinery."
The governor pointed out that the fire was immediately localized and open burning was eliminated.
There were no casualties as a result of the incident, according to TASS.
Earlier, the Russian Emergencies Ministry reported a fire at the Volgograd oil refinery.
MP/PR