An 86-year-old has died following a four-vehicle collision in the Hwy. 401 westbound express lanes, approaching Leslie St., on Saturday.

Ontario Provincial Police were called to the scene around 4:25 p.m., said Const. Lauren Ball.

One person was transported to hospital with life-threatening injuries, she said. That person later died in hospital.

In a tweet, police said the deceased was an 86-year-old woman.

Ten other people, including three children, were also taken to hospital with non-life threatening injuries, said police.

The westbound express lanes were closed at Warden Ave., and the Hwy. 404 southbound ramp to Hwy. 401 westbound express lanes were also closed. They have since reopened.