Footage shot from the road shows a huge explosion at an arms depot near Tikhoretsk in Russia.
Ukraine said munitions from North Korea had been among those it was targeting.
The governor of the Krasnodar region confirmed it came under Ukrainian drone attack on Friday night.
He said debris from a drone had sparked a fire, which “spread to explosive objects” and caused detonations. Residents nearby had been evacuated, and nobody was reported injured.
