16-year-old boy killed, 56-year-old woman seriously injured in rollover off of I-40 in Flagstaff, AZ

A 16-year-old boy was driving west on I-40 in Flagstaff when he for some reason drove off of the roadway, where the vehicle rolled multiple times. The teenaged driver was thrown from the vehicle and pronounced dead, while a 56-year-old woman who was a passenger was trapped in the vehicle and was transported to the hospital with serious injuries after being extricated. Investigation continues to determine the cause of this accident.