The United States is urging India to cooperate with Canada’s investigation into the killing of a Sikh leader, following Canada’s public accusation that India’s government was involved. Canada has expelled the top Indian intelligence official in response, and India has ordered a senior Canadian diplomat to leave the country. The White House National Security Council has expressed concern and emphasized the need for Canada’s investigation to proceed. The allegations have the potential to impact Canada’s relations with India and come at a time when Canada is dealing with strategic challenges from China and Russia. Canadian officials have not disclosed the evidence linking India to the murder.