India has rejected allegations made by Canadian Prime Minister Justin Trudeau that its government agents were behind the assassination of a prominent Sikh leader in Canada, a shocking disclosure that risks worsening ties between the two countries.

"Allegations of Government of India’s involvement in any act of violence in Canada are absurd and motivated,” its Ministry of External Affairs said in a statement Tuesday.

Trudeau said there are "credible allegations” of India’s involvement in the killing. "Canada has declared its deep concerns to the top intelligence and security officials of the Indian government,” Trudeau said Monday in the House of Commons in Ottawa.