Police have released security surveillance images of a man wanted in connection with a sexual assault on a GO bus that was travelling from Square One in Mississauga to Union Station.

The sexual assault happened on March 31. Police say a 23-year-old woman was sitting on the bus, where a man was sitting "very close" to her. The woman was then sexually assaulted, police say.

The man is described as being brown and has an average build with short black hair. At the time of the incident, police say he had black stubble on his cheeks and was wearing glasses. He was also wearing a black jacket with a fur trim on the collar, light-coloured pants, black shoes and was carrying a black backpack.

Anyone with information is asked to contact police at 416-808-5204, or Crime Stoppers at 416-222-TIPS (8477).