Parents might want to have the stranger danger conversation with their kids tonight.

This after Toronto police issue a warning about a potential sex offender.

A young girl told police she was approached by a man in the washroom of Portage Trail Community Junior School on Tuesday afternoon.

Officers are going over surveillance video.

The suspect is described as white, about 30 years old and tall with a skinny build, full beard and thick moustache.

He was wearing a black toque, black sweater, and black shoes with blue stitching, and he was carrying a black satchel.