A woman was sitting on a porch on Tuesday afternoon when she was approached by a man and sexually assaulted, police say.

Police say the victim called for help and the suspect fled.

The incident happened at approximately 1:30 p.m., at a private residence in the McLevin Avenue and Neilson Road area.

The suspect is described as a 20-to-25-year-old brown male with a medium build who is between five-foot-eight and six feet tall. He is clean-shaven and has black hair with a brush cut.

Police say he was last seen wearing a black, long-sleeved knit sweater with a multi-coloured pattern on the front. He also wore jeans.

Anyone with information is asked to contact police at 416-808-4200. Tips can also be passed to investigators via Crime Stoppers at 416-222-8477.