"An Mi-28 helicopter crashed in the Kaluga Region while performing a routine flight. The helicopter went down in a deserted area. There is no destruction on the ground. The crew was killed," the ministry said.
According to the military, a technical malfunction has become the preliminary cause of the helicopter crash, TASS reported.
"A commission of the Russian Aerospace Forces is working at the site of the crash," the ministry added.
MNA/