The fire forced the evacuations of 28,000 people within a 10-kilometer ( 6.2 mile ) radius of the depot at the military base in Pugachevo , located east of Moscow . The explosion occurred during the storage of munitions . An investigation is ordered by the Russian Defense Minister . It 's the 3rd explosion at a Russian munitions depot this year .
The explosion occurred during the storage of munitions . An investigation is ordered by the Russian Defense Minister . It 's the 3rd explosion at a Russian munitions depot this year .