Grey County OPP are continuing to investigate a head-on collision southwest of Owen Sound.
OPP say just after 11 PM Friday night — an eastbound blue Mazda and southbound red Mazda collided at the intersection of Grey Roads 18 and 5, commonly known as Mennonite Corners.
That intersection is controlled by traffic lights.
Both cars sustained major damage and the intersection was closed for 9 hours while investigators combed the scene.
All the drivers and passengers were taken to Grey Bruce Health Services in Owen Sound.
The driver of the red car was a 21 year old woman from Ayton.
She was airlifted to London with serious injuries but is now in stable condition.
Grey County OPP are asking for anyone with information on the collision to contact them.
