EXPLAINER: Why some schools in Canada have unmarked graves

TORONTO (AP) — Leaders of Indigenous groups in Canada say investigators have found more than 600 unmarked graves at the site of a former residential school for Indigenous children, which follows the discovery of 215 bodies at another school last month.

The new discovery was at the Marieval Indian Residential School, which operated from 1899 to 1997 where the Cowessess First Nation is now located, about 85 miles (135 kilometers) east of Regina, the capital of the province of Saskatchewan.

Ground-penetrating radar registered 751 ’’hits,″ indicating at least 600 bodies were buried, said Chief Cadmus Delorme of the Cowessess. Some and perhaps most are from over a century ago. The gravesite is believed to hold the bodies of children and adults, and even people from outside the community who attended church there.

Perry Bellegarde, chief of the Assembly of First Nations, said it is not unusual to find such graves at former residential schools but is always a devastating discovery that reopens old wounds about the forced assimilation of native children at those often-abusive institutions.

Many non-Indigenous Canadians were not aware of the extent of the problems at the schools until the remains of 215 children were found last month at what was once the country’s largest such school in British Columbia.

WHAT ARE RESIDENTIAL SCHOOLS?

From the 19th century until the 1970s, more than 150,000 Indigenous children were forced to attend state-funded Christian boarding schools in an effort to assimilate them into Canadian society. Thousands of children died there of disease and other causes, with many never returned to their families.

Nearly three-quarters of the 130 residential schools were run by Roman Catholic missionary congregations, with others operated by the Presbyterian,...