Authorities are investigating what led a commuter plane carrying 10 people to crash off the coast of Alaska. Two people killed on the turboprop aircraft have been identified.

Two of the 10 passengers onboard the Bering Air plane that went missing outside Nome, Alaska, on Feb. 6 were utility workers who were flying back from Unalakleet after helping to ‘address heating and mechanical issues in the depths of winter.

Recovery crews worked amid freezing temperatures and slushy sea ice Friday to recover the remaining victims aboard a regional airline flight that crashed off the coast of western Alaska.