A total of 67 students are believed to have died at the school.
Ground-analyzing technologies have identified 17 potential unmarked graves on lands that were once part of the Alberni Indian Residential School, the Tseshaht First Nation announced Tuesday.
The results do not show human remains and do not confirm a site is a grave, said Brian Whiting of GeoScan, a company using ground-scanning radar equipment at Alberni and other former residential schools.
The only way to be 100 per cent certain is by testing and excavation, he said.
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