The crews are still working to recover the bodies of 10 people killed in a plane crash in Alaska, officials said.
Jennifer Mumendy, president of the National Transportation Safety Board, said that the investigation into the accident was in her “early stadiums” and that he was too early to say what had caused her.
The Cessna Grand Caravan plane, operated by the regional operator Béring Air, went from Unalakleet to Nome on Thursday when he lost the radar contact.
Nine passengers and a pilot were aboard the plane when he went down to Norton Sound at around 34 miles (55 km) south-east of Nome, a city of around 3,500 on the west coast of Alaska .
Among the dead were the Rhône Baumgartner and Kameron Hartvigson, two employees of the Alaska Tribal Health Consortium.
They went to Unalakleet to carry out maintenance work on a water plant, the non -profit organization announced on Friday.
Ms. Homendy said nine investigators were on the spot, supported by Washington DC specialists.
“Restoration efforts are still underway, priority being the recovery of victims,” she said at a press conference in Anchorage, the largest city in Alaska.
“I would like to take a moment and devote our greatest condolences to people who have lost dear beings in this tragedy,” she said.
Ms. Homendy said that recovery workers were faced with the deterioration of weather conditions and that the wreckage had landed on a Floe of ice that was moving at a rate of five miles per day.
In a press release, Bering Air, which operates commercial and charter flights, expressed condolences and said it would cooperate the accident investigation.

Alaska state soldiers said he was informed of a “late” plane at 4:00 p.m. local time on Thursday (01:00 GMT).
Nome’s voluntary fire service said the pilot told air traffic controllers that “he intended to seize a relaxation model while waiting for the track to be erased.”
The American coast guard later said that the plane had suffered a rapid loss of altitude and speed before loss of contact.
Images showed low visibility in the area at the time of the accident.
The senator from Alaska Lisa Murkowski shared her condolences after the incident.
“Alaska is a large town. When the tragedy strikes, we are never far from Alaskans directly affected,” she wrote online.
Alaska governor Mike Dunleavy said he was “broken heart” by the disappearance of the flight.
“Our prayers are with the passengers, the pilot and their loved ones during this difficult period,” he said.
Unakleet and Nome are about 150 miles from each other across Norton Sound, an entrance to the Bering Sea on the west coast of Alaska.
