The helicopter belonging to the Turukhan air company had rotation workers onboard.
The Yeniseysk transport prosecutors have launched an investigation into the accident, Oksana Gorbunova told TASS.
A source in the local law enforcement agencies said earlier that eight people had been killed and another 17 had been injured.
The chopper reportedly crashed soon after takeoff some 10km from the town of Igarka.
It was en route from Igarka to an oil production facility in Krasny Selkub.
The helicopter was carrying 25 people, including 22 passengers and three crew members. “The helicopter has fallen in the Yenisei [river] and is lying on the ice. People are being evacuated,” local police told TASS.
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