Two critically injured people were flown by helicopter to local hospitals after a truck rolled several times Tuesday morning.

The accident reduced I-80 to one lane in each direction until about 8 a.m., said Utah Highway Patrol Lt. Verdi White II.The truck was traveling east on I-80 about 5:45 a.m. when it rolled into the median and turned over three times, White said.

Investigators believe the driver went slightly off the road and then over corrected causing the truck to roll. Four of the six people inside the truck were ejected as it rolled, three of them were sleeping in a camper shell.

The truck and its occupants were returning to the Salt Lake Valley from Wendover, he said.

Sam Mafi and Fetuuloa Kisi were flown to University and LDS Hospitals, respectively. They were ejected from the truck and were listed as critical a few hours after the accident, White said.

The driver, Lotomona Mafi, was taken by ambulance to LDS Hospital. Investigators believe she was wearing a seat belt.

Also injured in the accident were: Mele Ova, Viliami Manu and a man identified only as William.

White said police found alcohol containers in and around the car, which was "totally demolished," but they're not sure if the driver had been drinking.