Toronto police need the public's help to identify a man who told a woman he had a gun, before taking her into a park and sexually assaulting her.

Police say the incident occurred as a 42-year-old woman was walking in the Rockcliffe Boulevard and Alliance Avenue area, east of Jane Street, on Friday evening.

The man approached the woman from behind, police say.

After they went into the park, police say the woman was able to break free and flee the area.

Anyone with information is asked to contact investigators at 416-808-7474. Tips can also be passed on anonymously through Crime Stoppers at 416-222-8477.