Helicopter suffers extensive damage and blades snap off - but only one injury.
Rescue teams rush to help survivors among 22 passengers in Arctic.
The helicopter carrying 17 people lurched on its side on takeoff, with 5 described as being in a 'grave' condition.
A criminal case into possible negligence was opened after the Mi-8 crashed in a mountainous area of Khabarovsk region.
The Mi-8 training flight ‘exploded’ after slamming into a field with communications antennae at Khabarovsk Disaster Medicine Centre.
A dozen passengers had a miraculous escape when a M1-8 helicopter fell on its side while landing.
Three crashes in four days with total toll of 16.
'Where is the help? Will there be any help?' begged injured Alexey Veremev, 42, as he used cell phone to report air tragedy.
Mi-8 delivered Hannah McKeand and Canadian companion to remote island weather station but crashed soon after, as pair abandon North Pole attempt.
The Mi-8 with 25 passengers and a crew of three on board crash landed some 45 km into a flight, said early reports.