China and its allies called on Tuesday for an investigation into the discovery of the remains of indigenous children in Canada at the site of a former boarding school, prompting an angry response from Prime Minister Justin Trudeau.

The remains of 215 children, some as young as three years old, were found at the Kamloops Indian Residential School in British Columbia that closed in 1978, the Tk'emlúps te Secwépemc Nation said on May 28.