Eighteen people were killed when a helicopter crashed shortly after take-off in Siberia when its rotor blades collided with another aircraft.
There were 15 passengers and three crew aboard, the airline said.
Russian news reports said all the passengers killed are believed to have been working for a subsidiary of the state oil company Rosneft.
Utair said the helicopter was made in Russian Federation in 2010.
The transport ministry said the Mi-8 helicopter, reportedly taking workers to an oilfield, went down when it collided with machinery carried by another helicopter soon after take-off.
The second helicopter was undamaged and landed safely, the committee said.More news: Trump tells attorney general to end Russian Federation probe
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Russian air safety has improved since the 1990s, when poor aircraft maintenance, pilot training and official oversight in the wake of the collapse of the Soviet Union resulted in a high crash incidence. The helicopter flew 2 kilometre before it crashed.
The helicopter fell apart and caught fire, according to the statement. A criminal investigation is under way.
The Criminal Investigation Department of Russian Federation continues to investigate the crash under the criminal code for violation of safety rules that resulted in the death of two or more persons by negligence, Kommersant reported.
In 2016, 19 people died when a Mi-8 helicopter carrying oil and gas field workers crashed in a remote area of Siberia.
'Utair's Mi-8 helicopter 25640 was flying from Vankor to Kharkasale, ' said an spokesman for Russia's emergencies ministry.