Four people were taken to various hospitals after a single-vehicle rollover into a ditch in Springwater Township.
Ontario Provincial Police say it happened around 8 p.m. Thursday on Penetanguishene Road just north of Hillsdale.
Two female passengers were taken to Georgian Bay General Hospital in Midland with serious, but non-life-threatening injuries. The male driver and another man were sent to Royal Victoria Regional Health Centre in Barrie, and the second man was later airlifted to Sunnybrook Hospital in Toronto.
Penetanguishene Road was closed for five hours between South Orr Lake Road and Robert Boulevard but has since reopened.
Huronia West OPP is seeking the public's assistance and requesting that anyone who may have witnessed this incident or has video or dash cam footage that may assist the investigation is asked to contact 1-888-310-1122 or Crime Stoppers to remain anonymous at 1-800-222-8477 or www.stopcrimehere.ca.
The investigation is ongoing.
