A 73-year-old former public school teacher in Ottawa is facing 14 sexual assault-related charges involving two alleged victims — between the ages of 14 and 17 — in the 1970s and early '80s.

Donald Greenham was teaching and coaching for the Ottawa-Carleton District School Board at the time, and in a media release issued Monday, police allege the incidents took place in the course of his duties.

Police did not specify which sport Greenham coached.

Greenham, whose address is listed in Addison, Ont., was arrested and charged on Monday with multiple counts of gross indecency, indecent assault on a male and indecent assault on a female. Those are the charges that existed in Canada's criminal code at the time of the alleged offences.

He appeared in court on Monday and was scheduled to return to court on Wednesday.

The investigation into Greenham began in late June when a victim came forward to police. Investigators are concerned there could be other victims, police said.

Anyone with information is asked to call the Ottawa police sexual assault and child abuse unit at 613-236-1222, ext. 5944. Anonymous tips can be submitted by calling Crime Stoppers toll free at 1-800-222-8477 (TIPS).