A Russian-origin Mi-8 military helicopter belonging to Kazakhstan crashed in the south-western part of the country on Wednesday, killing all 13 on board the aircraft.
“13 servicemen were killed... while performing their military duty," defence ministry said in a statement Thursday.
Kazakhstan's new president Kassym-Jomart Tokayev tweeted that he had ordered an investigation into the crash. A Soviet-era workhorse first built in the 1960s, the Mi-8 helicopter is widely used to transport passengers and supplies to remote sites.
The Mil Mi-8 is a medium twin-turbine helicopter used for airborne command post, armed gunship, and as a reconnaissance platform.