Both the helicopters were owned by UTair-Helicopter Services, a unit of Russian airline Utair.
The helicopter, which belonged to UTair, a Russian airline, crashed Saturday morning in the north of Krasnoyarsk region, eastern Siberia, near the Vankor oil pumping station.
The second helicopter involved landed safely.
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The accident took place at 9:48 local time (0248 GMT) when the helicopter crashed 180 km north of the town of Igarka in Turukhansky District, the ministry's Krasnoyarsk region branch said in a statement.
In 2016, 19 people died when a Mi-8 helicopter carrying oil and gas field workers crashed in a remote area of Siberia. The criminal investigators of the Main Directorate of Criminalistics of Russia's Investigative Committee were sent to the scene, the committee said in a statement. The second helicopter taking off with passengers on Board collided with the already airborne Mi-8 and hooked his external cargo suspension.
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The plane is registered to a San Francisco-based real estate consulting company, Category III, according to an FAA database. The plane crashed just a block away from South Coast Plaza, a large mall.
According to the regional emergency services, Mi-8 crash was caused by a technical failure due to which the helicopter fell apart and caught fire.
A spokesman for the emergency team said two flight recorders had been found at the site of the crash.
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