Prime Minister Justin Trudeau said there are "credible allegations” that agents of the Indian government were behind the killing of a prominent Sikh leader in Canada.

Hardeep Singh Nijjar was slain in June outside a temple in Surrey, British Columbia, raising tensions between Sikh separatists and the Indian government. Nijjar’s death sparked protests among supporters of the separatist movement, who alleged the Indian government was behind the killing.

"Canada has declared its deep concerns to the top intelligence and security officials of the Indian government,” Trudeau said on Monday in the House of Commons in Ottawa. The prime minister said he raised his concerns "personally and directly” with Indian Prime Minister Narendra Modi on the sidelines of the Group of 20 meeting last week in New Delhi.