Two Russian pilots were killed on Friday when a Russian Mi-28 military helicopter crashed in the annexed peninsula of Crimea, Russian news agencies reported, citing the defence ministry.
The defence ministry said it believed the reason for the crash was equipment failure, the TASS news agency reported.
The crash occurred at 3.42 p.m. (1242 GMT) during a training flight, and the helicopter was flying without weapons, news agencies cited the defence ministry as saying in a statement.