Police said they responded to a sexual assault call in the area of McCowan Road and Finch Avenue East on June 30 just before 4 p.m.
A 15-year-old girl was riding a TTC bus traveling south on McCowan Street when a man boarded the bus and sat next to her, police said.
When the girl proceeded to get off the bus, the man allegedly sexually assaulted her.
On Sunday, police released surveillance video images of the wanted suspect. He is described as five-foot-three, weighs about 200 pounds. of medium build, thin black hair and brown eyes.
Police said she was wearing a blue jacket, a blue and white striped polo shirt, khaki pants, black running shoes with white soles and was carrying a pink bag.
They are asking anyone with information to contact them at 416-808-4200 or Crime Stoppers anonymously at 416-222-TIPS (8477).
