OSHAWA, Ont. -- A former youth worker in Durham Region, east of Toronto, is facing sexual assault charges in connection with alleged incidents dating back 20 years.

It's alleged a man had "inappropriate sexual contact" with a boy over a two-year-period, starting in 1994 when the boy was eight.

Police say the alleged incidents happened in nearby Whitby, where the accused previously lived.

John Anthony Parnis, 59, faces charges of sexual assault, sexual interference and invitation to sexual touching.

Police say the accused was a youth worker in the region for many years and while the charges are not connected to those activities, investigators want to ensure there are no other victims.