The 20-year-old man who died in the parking lot of a Waterdown Sobeys Thursday was struck and killed by a transport truck making a delivery, police announced Friday.

Emergency crews were called to the grocery store parking lot at 255 Highway 5 around 1 p.m. They found the man on the ground, who had sustained serious injuries.

"He was transported to the hospital where he later succumbed to his injuries," a police news release reads.

According to the investigators, the man was hit by a commercial vehicle while it was making a delivery to the store. The man who died wasn't a store employee, nor an employee of the trucking company, police say.

The investigators have ruled out speed and alcohol as factors in the collision.

This is the city's third traffic fatality in less than a week. There have been nine traffic deaths in 2016, and three of those deaths have involved pedestrians.

The provincial Ministry of Labour and the Ministry of Transportation have both been called in to assist with the investigation.

Anyone with information is asked to call police at 905-546-4755.