A man who was found in a vehicle in North York suffering from a gunshot wound early Sunday has died of his injuries, Toronto police say.

The man was found in an SUV in a plaza parking lot at Keele Street and Wilson Avenue, according to Insp. Jim Gotell, spokesperson for the Toronto Police Service.

Emergency crews were called to the area about a person in medical distress shortly before 1 a.m..

When police and paramedics arrived, they found the wounded man without vital signs. Toronto paramedics tried to save his life, but he was pronounced dead on the scene.

"As a result, we are now conducting a homicide investigation," Gotell told reporters.

Police have not yet determined whether the man was shot in the vehicle or whether he drove to the plaza. Gotell said police received no calls about the sound of gunshots in the area.

Police are searching the area for witnesses and security camera video. (Jeremy Cohn/CBC)

"The investigation to determine what transpired prior to this is just beginning," Gotell said. "Obviously, we will be trying to determine where the scene was."

Gotell declined to say whether anyone else was in the vehicle when the man was found.

Police seeking witnesses, security camera video

Homicide detectives are now investigating. Police's forensic identification unit was on the scene early Sunday.

The man's name and age have not been released.

Police are continuing to search the area for witnesses and security camera video. Part of the parking lot is behind police tape as officers investigate.

"It was late at night, but there were still people out and about in that parking lot. We are hoping that people may have been there and may have observed something," Gotell said.

Anyone who was in the area at the time and saw anything, or who has dashboard camera video that captured something, is urged to call Toronto police at (416) 808-3100.

Toronto paramedics tried to save the man's life, but he was pronounced dead on the scene. (Jeremy Cohn/CBC)