An indigenous group in Canada's Saskatchewan province has said that the unmarked graves of 751 people have been found at a former residential school.
It comes just weeks after a similar discovery in British Columbia rocked the country.
The Catholic Church that ran the Marieval Indian Residential School about 140km from the provincial capital Regina, removed the headstones, Cowessess First Nation Chief Cadmus Delorme told reporters.
It is not clear how many of the remains detected belong to children, Mr Delorme said. "There are oral stories that there are adults in this gravesite as well."
"As of yesterday, we have hit 751 unmarked graves" at the site of the former Marieval boarding school, Delorme said. "This is not a mass grave site. These are unmarked graves."
According to Canada's Truth and Reconciliation Commission, which published a report that found the country's residential school system amounted to cultural genocide, a cemetery was left on the Marieval site after the school building was demolished.
"We are not asking for pity. We are asking for understanding," Mr Delorme said.
"We didn't remove the headstones. Removing headstones is a crime in this country. We are treating this like a crime scene," he added.
Federation of Sovereign Indigenous Nations Chief Bobby Cameron described the finding as "a crime against humanity".
"The world is watching Canada as we unearth the findings of genocide," he said.
"We had concentration camps here ... Canada will be known as the nation that tried to exterminate the First Nations."
The Cowessess First Nation began a ground-penetrating radar search on 2 June, after the discovery of 215 unmarked graves at the Kamloops Residential School in British Columbia.
The Kamloops discovery reopened old wounds in Canada about the lack of information and accountability around the residential school system, which forcibly separated indigenous children from their families.
