A man in his 20s is fighting for his life after an early morning rollover on Highway 403 near Ancaster.
The westbound lanes from Wilson Street are closed all the way to Highway 52.
OPP say the crash occurred sometime around 1:30 a.m. Wednesday, and expect the road to reopen by 7 a.m.
Local paramedics tell CHCH News that a woman, also in her 20s, was taken to hospital in non-life-threatening condition.
The cause of the collision remains unknown.
This story is developing. Check back for more.