London police say a woman suffered life-threatening injuries in a single-vehicle rollover in the area of Westdel Bourne and Fletcher Rd.
Police say they were called to the area around 2am Sunday. When they arrived, they found a white Honda Civic that had gone off the road.
A 32-year-old London woman has been take to hospital with life-threatening injuries.
The Traffic Management Unit and the Forensic Identification Section are investigating.
Anyone with information is asked to contact police.