The discovery of SLOTXO unmarked Indigenous graves on the eve of the 1 July Canada Day holiday has prompted calls for national celebrations to be cancelled.
The remains of 182 people near the grounds of a former residential school in British Columbia were found by the Lower Kootenay Band on Wednesday.
The discovery adds to a rising tally of unmarked grave sites across Canada.
Indigenous leaders have said they expect more graves will be found as investigations continue.
This most recent discovery fell on the eve of Canada Day, the nation's founding holiday meant to mark the date in 1867 when three British colonies were joined to create the Dominion of Canada.
Many Indigenous people in Canada have never recognised Canada Day, a sentiment that has grown in recent weeks as more grave sites were found.
Municipalities across Canada have cancelled celebrations and statues of figures involved with residential schools have been vandalised or removed throughout the country.