A huge fire broke out on Saturday at a fuel depot in Sevastopol, the main port in Moscow-annexed Crimea, with authorities saying it was the result of a drone attack.
Sevastopol is home to Russia's Black Sea Fleet and has been hit by a series of drone attacks since the Kremlin's Ukraine offensive launched last year.
"According to preliminary information, it was caused by a drone strike."
He said the fire's size was "around 1,000 square metres" and published images of huge clouds of smoke rising into the air.
Razvozhayev called on Crimeans to "remain calm" and in a later post said "nobody was hurt."
He said authorities had "the situation under control" and said there was no threat to civilian infrastructure.
Earlier this week, Russia said it had "repelled" a drone attack on the port.