Nijjar killing, attempt on Pannun's life part of 'single' plot, claims Canada's ex-envoy

US and Canada are investigating a plot allegedly originating from Delhi to kill Khalistani separatists in North America. A former Indian agent has been indicted. Canada expelled Indian diplomats, and India recalled their diplomats. Indian government denies these allegations, setting up a high-level committee to probe further. Tensions between India and Canada increase.