Hundreds of unmarked graves discovered at former children's school in Canada

At least 600 unmarked graves were discovered at a former residential school for Indigenous children in Canada, Indigenous leaders said Thursday. The discovery comes less than a month after officials found the bodies of 215 children buried at another school in British Columbia.

The hundreds of unmarked graves were discovered at the former Marieval Residential School in Saskatchewan, Cowessess First Nation Chief Cadmus Delorme said in a news conference Thursday. Delorme said a search resulted in 751 "hits" but the radar used has a 10 to 15% error rate. "We cannot affirm that they are all children," he said. "This is not a mass gravesite. These are unmarked graves."