Ottawa Police are investigating after a three vehicle collision on Hunt Club at McCarthy Saturday morning.
A 21-year-old man suffered serious injuries after his vehicle rolled over.
He was found unconscious and then rushed to the trauma centre.
The other vehicle occupants did not suffer any injuries.
Elsewhere, a 26-year-old woman died after a head-on collision on the Highway 50 near Grenville earlier the same day.
Quebec provincial police say this happened around 7 a.m. when the woman was going westbound, crossed the median and collided with another vehicle with two people in it.
The driver of the 2nd vehicle has also passed away in hospital from her injuries on Sunday morning.
Police say drowsiness and distraction are likely factors.