Quebec provincial police say three people are dead after a collision Monday on the Guy Lafleur Highway (formerly Highway 50) in Grenville-sur-la-Rouge.
It happened at around 5 p.m. when an eastbound vehicle crossed into the westbound lanes about 80 kilometres east of Gatineau.
The Sûreté du Québec (SQ) confirm that three people in one of the cars have died, while a fourth is injured. Two people in the other car were also seriously injured, but are expected to survive.
The SQ did not identify any of the victims.
The circumstances of the crash remain under investigation. Traffic has since resumed on the highway after a closure on Monday.