A survivors group that has been investigating the site of the former St. Mary's Indian Residential School in Kenora, Ontario, says ground-penetrating radar has revealed at least 171 plausible anomalies or burials.

The Kaatagoging Survivors Group has been searching the site for unmarked graves or human remains since May. On Tuesday, it announced its findings.

The group noted that the investigation was initiated under cultural protocols and that the surveys conducted by the technical radar, archaeological and ground penetration teams were informed by testimony from survivors.

Within the cemetery grounds of the former school, there are five gravestones. The Nation said the next steps are to obtain greater certainty about the number of plausible graves on the cemetery grounds.

Chris Skead, chief of the Wauzhush Onigum Nation, said each discovery of unmarked graves across the country further underscores the importance of Canadians understanding the truth of what happened in the residential school system.

"I want Canadians to remember that these are our children. They didn't get to grow up, become teenagers, love someone but their parents, have a normal life. They didn't get to play with other kids and navigate through life," said Skead.