The mass grave was found at the Kamloops Native Boarding School, which was closed in 1978 in the province of British Columbia. The remains of the bodies were detected by underground scanning radars during the examination around the school.
Canadian Prime Minister Justin Trudeau called the event “a painful memory of a shameful period in our country’s history”.
In Canada, Indigenous children were taken from their families in the 1800s and 1900s and forced into boarding schools run by government and religious authorities, aimed at assimilating indigenous children.
Kamloops Boarding School was one of the largest. Authorities are trying to reach families whose children have been sent to school. A preliminary report on the mass grave is expected in mid-June.