New Delhi, India on Friday criticized the Canadian Parliament for observing a "minute of silence" in memory of Khalistan extremist Hardeep Singh Nijjar, who was shot dead in Surrey, British Columbia in June last year.

"We naturally oppose any move that gives political space to extremism and advocacy of violence," External Affairs Ministry spokesperson Randhir Jaiswal said.

In an unusual move, the Canadian Parliament observed a "minute of silence" in memory of Nijjar two days earlier.

Relations between the two countries came under severe strain following Trudeau's allegations of "possible" involvement of Indian agents in the killing of Nijjar in September last year.

New Delhi dismissed Trudeau's allegations as "absurd".

India has been saying that the main issue between the two countries is Canada's exemption of pro-Khalistan elements operating from Canadian soil.

Foreign Secretary Vinay Kwatra last week said India's main issue with Canada remains the political space that Ottawa provides to anti-India elements that advocate extremism and violence.

He said India has repeatedly conveyed its "deep concerns" to Canada and New Delhi expects Ottawa to take strong action against those elements.

Nijjar, declared a terrorist by India, was shot dead outside a gurudwara in British Columbia on June 18 last year.

The murder is being investigated by the Royal Canadian Mounted Police (RCMP).