Russia's military says a fire has set off explosions at an ammunition depot in Crimea just a week after similar blasts at an air base on the disputed peninsula.
Moscow says no one has been seriously injured and that the cause of the fire has been determined.
Authorities say 2 000 people were evacuated as a precaution.
Crimea joined Russia after referendum in 2014, but Kiev does not recognize Russia's claim to the region.
No one has claimed responsibility for the Crimea fires.