A former priest with the Roman Catholic Church faces new accusations of historical sexual assault involving two young boys.

Donald Grecco spent time in jail earlier this decade after being found guilty of sexual assaults involving altar boys in the 1970s and 1980s.

Haldimand County OPP say new allegations against Grecco came to light several months ago, prompting another investigation.

Grecco now faces new charges of gross indecency and indecent assault.

Police say the allegations relate to incidents that occurred between 19777 and 1982, in locations around Haldimand County, Niagara Region and the United States.

During that time period, Grecco worked as a priest at churches in Cayuga, Welland and Niagara Falls.

The alleged victims of these incidents were boys aged 14 and 10 at the time.

With files from CTV Toronto