York Regional Police have charged Dr. Wameed Ateyah with seven counts of sexual assault. (Supplied)

Police north of Toronto have laid 20 new sex charges against a doctor for alleged incidents spanning nearly a decade.

York Regional Police initially charged the 49-year-old man from Richmond Hill, Ont., last month with seven counts of sexual assault related to two alleged female victims.

They now say 11 additional alleged victims have since come forward.

Police say all alleged similar experiences of being sexually assaulted during appointments.

One of them was 17 years old at the time of the alleged incident.

Police say the accused, Wameed Ateyah, worked at the Schomberg Medical Centre in King Township, Ont., from 2008 to 2017.

They're asking any other potential victims to come forward.

This report by The Canadian Press was first published Oct. 2, 2020.