Canada’s national flag flies at half-mast at the British Columbia Legislature in Victoria, after the remains of 215 children were discovered in a mass grave at the former Kamloops Indian Residential School site, May 30, 2021. [Photo/Agencies]

OTTAWA – The Canadian government lowered flags at half-mast on Sunday to commemorate the deaths of 215 Indigenous children whose remains were found in a former residential school in Kamloops city in the country.

“To honor the 215 children whose lives were taken at the former Kamloops residential school and all Indigenous children who never made it home, the survivors, and their families, I have asked that the Peace Tower flag and flags on all federal buildings be flown at half-mast,” Canadian Prime Minister Justin Trudeau tweeted on Sunday.

The prime minister’s order came a day after Stacey Laforme, chief of Mississaugas of the Credit First Nations (MCFN) in Ontario issued an open letter to Trudeau, urging his government to lower the flags and declare a national day of mourning.

“We call on the Prime Minister to lower flags of this country and declare a national day of mourning for our children!” Laforme’s open letter read on Twitter. “These children were forcibly taken by the state. They died at a church-run residential school and were buried without dignity.”

An online petition on Change.org has also been circulating, calling on the Trudeau government to establish a national day of mourning in honor of the 215 children. As of Sunday afternoon, it has amassed nearly 9,000 signatures.

On Thursday, the Tk’emlups te Secwepemc First Nation in Kamloops city in British Columbia province announced that ground-penetrating radar uncovered the remains of 215 children at the Kamloops Indian Residential School. The remains were confirmed with the help of a ground-penetrating radar specialist.

A man stands with his son in front of a monument to the survivors of the former Kamloops Indian Residential School, after the remains of 215 children, some as young as three years old, were found at the site in Kamloops, British Columbia, Canada May 29, 2021. [Photo/Agencies]

Among the 215 children, some were three years old. The children were assumed to have been lost or runaway in Canada’s residential school system.

The Kamloops school operated between 1890 and 1969. The Canadian government took over the operation from the Catholic church to operate as a day school until it closed in 1978.

At one point, the school was the largest in Canada’s residential school system.

Canada’s Truth and Reconciliation Commission issued its final report on residential schools in 2015. The report detailed the harsh mistreatment inflicted on Indigenous children at the institutions, where at least 3,200 children died amid abuse and neglect.