WATCH: Huge explosion at Ukrainian ammunition depot

Ukrainian officials have evacuated tens of thousands of residents after a fire and ammunition explosions at a military base.

The Interior Ministry said on Wednesday that firefighters were still putting out the blaze which broke out in the town of Kalynivka, 120 miles (190km) south-west of the capital, Kiev, late on Tuesday.

A powerful explosion is seen in the ammunition depot at a military base in Kalynivka, west of Kiev, Ukraine, early Wednesday, Sept. 27, 2017. Ukrainian officials say they have evacuated more than 30,000 people after a fire and ammunition explosions, at the military base. (AP Photo/Efrem Lukatsky)

A powerful explosion is seen in the ammunition depot at a military base in Kalynivka, west of Kiev, Ukraine, early Wednesday, Sept. 27, 2017. Ukrainian officials say they have evacuated more than 30,000 people after a fire and ammunition explosions, at the military base. (AP Photo/Efrem Lukatsky)

Authorities bussed more than 30,000 people out of the area, and turned off the electricity and gas supply.

Four residential buildings were damaged by the fire but no casualties have been reported.

Prime Minister Volodymyr Groysman, who arrived in the area early on Wednesday, said on local television that the situation is under control. The cause of the fire was under investigation.