Toronto police have released images of a suspect wanted after one person was seriously injured in an unprovoked assault on a TTC bus on Wednesday.

Police said they responded to an assault call in the area of Weston Road and Church Street at 6:40 p.m.

Officers learned that an unknown male suspect approached the victim while on board a TTC bus and allegedly repeatedly assaulted them.

Shortly after, the suspect fled the area, leaving the victim with serious injuries, police said.

The suspect is described as a tall male with a lean build, short curly black hair and clean-shaven.

He was last seen wearing a white t-shirt with a small black logo on the bottom, white sweatpants with a small black logo at the top and black sandals.

Anyone who can identify the suspect and knows his whereabouts is being asked to contact police at 416-808-1200 or Crime Stoppers anonymously at 416-222-TIPS (8477).