By ROB GILLIES (Associated Press) TORONTO (AP) — Canada expelled a top Indian diplomat Monday as it investigates what Prime Minister Justin Trudeau called credible allegations that India’s government may have had links to the assassination in Canada of a Sikh activist. Trudeau said in Parliament that Canadian intelligence agencies have been looking into the allegations after Sikh leader Hardeep Singh Nijjar, a strong supporter of an independent Sikh homeland known as Khalistan, was gunned down on June 18 outside a Sikh cultural center in Surrey, British Columbia. Trudeau told Parliament that he brought up the slaying with Indian Prime Minister Narendra Modi at the G-20 last week.