At least nine people were killed, including a pilot and two children and three others left injured after a plane crashed in southern South Dakota, authorities said.
Twelve people were on board when the plane went down in rural Brule County en route from Chamberlain to Idaho.
Survivors were taken to Sioux Falls for treatment; details on their condition are not immediately available.
The Pilatus website states that the PC-12 can carry up to 10 passengers and is flown by one pilot.
The National Transportation Safety Board said it is investigating the crash of the Pilatus PC-12.
The Federal Aviation Administration has also been notified, according to Maule Rossow.
“The men and women of law enforcement, first responders and medical professionals should be commended in their heroic actions to rescue the victims in extreme weather conditions,” she said in a statement.
Chamberlain and other parts of South Dakota are under a winter storm warning that will last until noon on Sunday, according to the National Weather Service in Sioux Falls.
Weather Service warned of ice, snow and winds gusting as fast as 64km/h as stormy weather around the country is predicted to hit millions of travellers returning from Thanksgiving trips.
All people on board on the downed plane were from Idaho, Maule Rossow said.