The Waterloo Regional Police Service is investigating after a man was sprayed with a noxious substance in Cambridge. Officers responded to the incident around 9:15 p.m. on Sunday in the area of Glebe Street and St. Andrews Street. According to police, an unknown woman sprayed the man with a noxious substance and then left the area. The victim was treated for non-life-threatening injuries. Police have release a picture of a woman they believed was involved, and are asking for help to identify her.