Shots rang out during the lunch hour in the east end, with bullets hitting a business and a parked car.
Police were called to the area of Sheppard Ave and Shorting Rd, which is near McCowan Rd, just before 1 p.m.
A witness reported hearing multiple gunshots and seeing a man running away.
When officers arrived on scene, they found shell casings. Some of the bullets hit a nearby business and a parked car.
Police say they have not found any victims.
They are looking for the man seen taking off, who is being called a person of interest at this time. He was wearing a blue hoodie.