07/16/2012 11:14 EDT | Updated 09/15/2012 05:12 EDT

Woman suffers life-threatening injuries in highway crash

An elderly woman has been airlifted to hospital after the car she was travelling in rolled over on Highway 401 on Monday evening.

The vehicle was moving westbound along the highway when it rolled over near Stevenson Road in Oshawa, Ont.

The man driving the vehicle was hospitalized with serious injuries, while the woman suffered life-threatening injuries.

Police say they do not know why the vehicle left the highway.