What is known about the murder of Sikh separatist leader in Canada?

A sign outside the Guru Nanak Sikh Gurdwara temple is seen after the killing on its grounds in June 2023 of Sikh leader Hardeep Singh Nijjar, in Surrey, British Columbia, Canada September 18, 2023. REUTERS/Chris Helgren

(Reuters) - Canadian Prime Minister Justin Trudeau said on Monday Canada was "actively pursuing credible allegations" linking Indian government agents to the murder of a Sikh separatist leader, Hardeep Singh Nijjar, in British Columbia in June.

Canada is home to an influential Sikh community and Indian leaders say there are some fringe groups there that are still sympathetic to the cause of an independent Sikh state called Khalistan, carved out of India. A Sikh insurgency that was suppressed in India in the 1990s killed some 30,000 people.