Four people have been injured, two critically, in a collision in Scarborough.

Toronto police said two vehicles crashed in the area of Warden Avenue and St. Clair Avenue East around 10:45 p.m. on Sunday.

Toronto paramedics said they transported two people to hospital, both in life-threatening condition.

Two others were also taken to hospital with serious but non-life-threatening injuries, paramedics said.

The cause of the collision is unknown.

Roads in the area have been closed for investigation.