Canada: Indigenous Group Finds Unmarked Graves of 751 People at Erstwhile School The latest discovery, the biggest to date, is a grim reminder of the years of abuse and discrimination indigenous communities have suffered in Canada. A crew performs a ground-penetrating radar search of a field, where the Cowessess First Nation said they had found 751 unmarked graves, near the former Marieval Indian Residential School in Grayson, Saskatchewan, Canada June 18, 2021. Picture taken June 18, 2021. Photo: Federation of Sovereign Indigenous Nations/Handout via Reuters. World25/Jun/2021 An indigenous group in the Canadian province of Saskatchewan on Thursday said it had found the unmarked graves of an estimated 751 people at a now-defunct Catholic residential school, just weeks after a similar, smaller discovery rocked the country.