"On August 16, at about 6:15 (local time, 03:15 GMT), in the area of the Maiskoye village ... a fire broke out on the territory of a bunded site for temporary storage of ammunition in one of the military units. As a result of the fire, the stored ammunition detonated," the Russian ministry said in a statement, Sputnik reported.
No serious injuries have been reported so far, the ministry said, adding that measures are being taken to extinguish the fire and find out its causes.
Two civilians have been injured after the detonation of ammunition in the Maiskoye village but their lives are not in danger, Crimea head Sergey Aksyonov said.
Earlier on Tuesday, the local administration said that ammunition in a warehouse detonated in the Maiskoye village, causing evacuation of some 2,000 residents. The incident happened at about 6:00 a.m. local time (03:00 GMT).
On August 9, several rounds of ammunition detonated at the Saki Airfield in Crimea. The explosions left five people injured.