A 17-year-old cyclist died Wednesday after he collided with a car in Notre-Dame-de-Grâce. He was the second cyclist killed at a Montreal intersection in two days.

Police are trying to sort out differing accounts of how the accident in NDG happened.

The 17-year-old and his friend were on their bicycles, headed to a bowling alley.

Police said witnesses describe the teen going through a red light on St. Anne de Bellevue Boulevard and colliding with a car on St. Jacques Street.

Investigators believe he wasn't wearing a helmet at the time. He sustained major head trauma in the collision.

simon-jalbert

Simon Jalbert was riding with the teenager who was killed, and claims there was still 18 seconds on the green light when they entered the intersection.

But the cyclist who was with him at the time, Simon Jalbert, has a different version of events.

It was a violent collision, Jalbert said, but he disagrees with the police theory that the light was red.

There was still 18 seconds left on the light when they tried to go through the intersection, Jalbert said.

He said he is not certain, but he believes the driver of the car may have run the red light.

The 25-year-old woman who was driving the car was taken to hospital to be treated for shock.

Two witnesses were also treated for shock at the scene.

Police say their investigators are still trying to determine which version of events is accurate.

On Tuesday, a 56-year-old cyclist was killed when he was hit by a cement truck on Notre Dame Street East at Frontenac Street.