A woman walking her dog along a quiet North York suburb Sunday morning stumbled upon a man who was shot to death inside his vehicle.

She was walking her dog on Hammell Street, near Bathurst and Sheppard Streets, when she found the car parked on the side of the road with the door open. When she looked inside the silver Infiniti sedan, she found the man slumped over the wheel of the car.

He was pronounced dead on the scene.

Homicide detectives told reporters the man was murdered.

"It was definitely not a suicide, I can tell you that much," said Det. Wayne Fowler. "We're treating it as a homicide."

Fowler said police have not identified the victim but confirmed a witness report that the victim was a well-dressed man. He declined to say anything else about the victim.

"I can't comment on him until we find out who he actually is," said Fowler. "We don't know the whereabouts of this person or the vehicle overnight or where (the shooting) took place."

He also said he "can't comment" on whether a weapon was found. Investigators will spend the day canvassing the neighbourhood for clues, said Fowler.

The shooting comes a day after a woman in her twenties was shot to death outside an east-end Toronto bar. She was an innocent bystander caught in a shootout.

Toronto has now had 61 homicides in 2008.