Toronto police have released a security camera image of a man suspected of sexually assaulting a woman at Union Station.

The 29-year-old was in the York concourse around 11 p.m. Tuesday night when she was approached by a man and sexually assaulted.

The suspect is described as white, between 23 and 26 years old, five-foot-nine and 160 pounds with a short beard.

He was last seen wearing a black Toronto Raptors t-shirt, black baseball hat, green pants and black running shoes.

Anyone with information is asked to contact police.