OTTAWA, May 3 (Reuters) - Canadian police on Friday arrested members of an alleged hit squad linked to the murder of Sikh separatist leader Hardeep Singh Nijjar in British Columbia last year, the Canadian Broadcasting Corporation said on Friday.

Sources said investigators had identified the suspects in Canada some months ago and had been keeping them under tight surveillance, the CBC said.

The Royal Canadian Mounted Police were not immediately available for comment.

Prime Minister Justin Trudeau announced in September that Canadian authorities were pursuing allegations linking Indian government agents to the fatal shooting of Nijjar, a Canadian citizen. New Delhi rejected Trudeau's claim as "absurd."

Canada had been pressing India to cooperate in its investigation. The U.S. later revealed it had foiled an assassination attempt against a Sikh separatist on its soil.

The presence of Sikh separatist groups in Canada has long frustrated New Delhi. Nijjar was labeled a "terrorist" by India. (Reporting by David Ljunggren, editing by Ismail Shakil and Chizu Nomiyama)