Two Cottonwood teenagers died and three others were injured when the sport utility vehicle they were in veered off the road seven miles west of Seligman and flipped several times.
The crash occurred at 2:49 p.m. Tuesday on Interstate 40, the Department of Public Safety reported.
Jesus M. Garcia, 19, was ejected from the 1991 Isuzu Rodeo after it left the road and rolled over three times. He suffered massive trauma and was pronounced dead at the scene, the DPS reported.
Elizabeth Boivin, 16, suffered severe head, chest and abdominal injuries. She died Wednesday at Flagstaff Medical Center, a hospital spokeswoman said.
Lucia N. Boivin, 14, Elizabeth's sister, suffered a pelvic fracture and was listed in fair condition at Flagstaff Medical Center Thursday morning.
A fourth passenger, Eric Regalado, 18, suffered contusions and abrasions and was released from the hospital Wednesday afternoon, the spokeswoman said.
Dylan Engler, 19, the driver of the vehicle, underwent surgery for internal bleeding Wednesday night and was listed in fair condition. Engler was the only one wearing a seatbelt during the crash, the DPS reported.
The cause of the crash is still under investigation. Police believe tire tread separation caused Engler to lose control of the car. Drugs or alcohol were not involved in the crash and no criminal charges are pending, the DPS reported.