NEW DELHI - The Indian government issued a pointed and public warning to Prime Minister Stephen Harper to mind what they see as alarming evidence of Sikh extremism on Canadian soil.

Harper is usually the one to urge vigilance over extremism and terrorism as he travels the world meeting with his counterparts but on Tuesday the shoe was on the other foot during a meeting in India's capital with India's minister of state for external affairs Preneet Kaur.

"Prime minister, there was another area of great concern for us, which was the revival of anti-India rhetoric in Canada, and I am from the state of Punjab, which we are very happy you will be visiting," Kaur said during a morning meeting.

"We have after very hard times got a good situation of peace and progress back in Punjab and in India and we would like that to continue, so it does concern us I think, and we do appreciate very much that you have very been forthright and open about your stand on this."

Indian Prime Minister Manmohan Singh touched on the issue again during an evening ceremony. The two nations announced they had finally concluded their talks on how to implement a nuclear co-operation agreement, meaning Canadian companies might starting shipping uranium and other products to India in the near future.

"India and Canada are nations built on shared values that celebrate democracy, inclusiveness and diversity," said Singh. "We have similar concerns in combating terrorism, extremism and radicalism."

The issue of internal extremism has been one that has shaken India to the core over the past several decades — former prime minister Indira Gandhi was murdered by her own Sikh bodyguards after a string of events sparked by fundamentalists seeking their own separate, fundamentalist nation they would call Khalistan.

Canada too has been rocked by related terrorism. Police believe the bombing of a 1985 Air India flight that killed 331 people was orchestrated by Sikh extremists based in Canada.

Pockets of pro-Khalistan support are still visible in the Indo-Canadian community. The flags and seals of the movement appear at parades and at Sikh places of worship or gurdwaras. Hundreds of Sikhs protested on Parliament Hill in March against the death row sentence of an acknowledged Sikh terrorist, Balwant Singh Rajoana.

Harper responded to India's concerns by saying that Canada is a supporter of a united India.

"This is a view that is shared not just widely in Canada but very widely and very mainstream among our Indo-Canadian community," Harper said told Kaur during their meeting.

"We have over a million people who trace their origins to the Indian subcontinent and among my very large delegation on this trip are a considerable number of prominent Indo-Canadians, and certainly the support for the great progress India has made over the past generation is virtually universal in this community."

But Harper and his government have had to tread carefully when wading into the issue of potential Sikh extremism or even terrorism. The Conservative party enjoys substantial support from the Indo-Canadian community, some of whom feel they are being unfairly stereotyped by India.

British Columbia MP Nina Grewal said she doesn't really understand where the suggestion comes from that Canada has a Sikh extremist problem.

"Well, 99.9 per cent of the people are very peace-loving people ... I haven't witnessed anything of this type in Canada," Grewal said.

Foreign Affairs Minister John Baird had to smooth ruffled feathers earlier this fall after making comments about fighting terrorism during a visit to India.

"I want to make absolutely clear that at no point during my visit did I make generalized assertions about any community in Canada, including but not limited to Canadian Sikhs," Baird wrote in an open letter.

The federal opposition in particular has taken up the cause of Canadian Sikhs, who want more recognition of the November 1984 massacre of more than 3,000 Sikhs in India.

The remains of murdered Sikhs in razed villages were uncovered as recently as last year and many believe the Indian government has not done enough to bring the perpetrators to justice.

The massacre occurred in the aftermath of Indira Gandhi's assassination. The bodyguards were believed to have been retaliating for a bloody military operation in June of that same year aimed at extricating Sikh militants from the Golden Temple in Amritsar.

Groups such as the World Sikh Organization and the Canadian Sikh Congress argue that the community has a right to engage in a peaceful dialogue about a sovereign homeland and the Indian government is meddling in the affairs of Indo-Canadians.

Another group, Sikhs for Justice, recently called on Harper to advocate for human rights for Sikhs while in India.

NDP Leader Thomas Mulcair referred to the events of 1984 as "pogroms" in a recent release.

"The victims and survivors of 1984 have waited too long for recognition of their plight and frustration," Mulcair said. "Rehabilitation and support for the broken families, especially the widows, must be prioritized."

Harper is set to visit the Punjabi capital of Chandigarh on Wednesday.

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  • Prime Minister Stephen Harper and wife Laureen visit Sri Someshwara Swamy Temple in Bangalore, India on Thursday, November 8, 2012.

  • Prime Minister Stephen Harper and wife Laureen visit Sri Someshwara Swamy Temple in Bangalore, India on Thursday, November 8, 2012.

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  • Prime Minister of Canada Stephen Harper (L) and his wife Laureen Harper lay a wreath at Rajghat, Memorial for Mahatma Gandhi, during a visit in New Delhi on November 6, 2012. Canadian Prime Minister Stephen Harper is on a six day official visit to India till November 9.

  • Prime Minister of Canada Stephen Harper (2L), his wife Laureen Harper (L), Indian Prime Minister Manmohan Singh (2R) and his wife Gulcharan Kaur pose during the welcome ceremony at the Presidential Palace in New Delhi on November 6, 2012. Stephen Harper is on a six day state visit to India till November 9.

  • Prime Minister Stephen Harper's limo with Ontario plates is pictured in New Dehli, India on Monday, November 5, 2012. THE CANADIAN PRESS/Sean Kilpatrick

  • Prime Minister of Canada Stephen Harper (2L) inspects the Guard of Honour during the welcome ceremony at the Presidential Palace in New Delhi on November 6, 2012. Stephen Harper is on a six day state visit to India till November 9.

  • Prime Minister of Canada Stephen Harper (2L) inspects the Guard of Honour during the welcome ceremony at the Presidential Palace in New Delhi on November 6, 2012. Stephen Harper is on a six day state visit to India till November 9.

  • Prime Minister of Canada Stephen Harper (R) shakes hands with Indian President Pranab Mukherjee during a meeting at the Presidential Palace in New Delhi on November 6, 2012. Stephen Harper is on a six day state visit to India till November 9.

  • Canadian Prime Minister Stephen Harper (L) shakes hands with his Indian counterpart Manmohan Singh before a meeting in New Delhi on November 6, 2012. Harper is on a six-day state visit to India till November 9.

  • Canadian Prime Minister Stephen Harper (R) attends a meeting with his Indian counterpart Manmohan Singh (L) in New Delhi on November 6, 2012. Harper is on a six-day state visit to India till November 9.

  • Canada's Prime Minister Stephen Harper, left, and his wife Laureen Ann pose for a photograph in front of the Taj Mahal, in Agra, India, Monday, Nov. 5, 2012. Harper is on a five-day visit to India. (AP Photo)

  • Prime Minister Stephen Harper and wife Laureen visit the Taj Mahal in Agra, India on Monday, November 5, 2012.

  • Prime Minister Stephen Harper visits the Taj Mahal in Agra, India on Monday, November 5, 2012.

  • Prime Minister Stephen Harper and wife Laureen visit the Taj Mahal in Agra, India on Monday, November 5, 2012.

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  • Canadian Prime Minister Stephen Harper takes part in a business round table in New Dehli, India on Monday, Nov. 5, 2012. (AP Photo/The Canadian Press, Sean Kilpatrick)

  • Canada's Prime Minister Stephen Harper, left, and his wife Laureen Harper pose for photographs after visiting Mughal emperor Humayun's tomb in New Delhi, India, Monday, Nov. 5, 2012. Harper is on a five-day visit to India. (AP Photo/Saurabh Das)

  • Canada's Prime Minister Stephen Harper, left, and his wife Laureen Harper pose for photographs after visiting Mughal emperor Humayun's tomb in New Delhi, India, Monday, Nov. 5, 2012. Harper is on a five-day visit to India. (AP Photo/Saurabh Das)

  • Canada's Prime Minister Stephen Harper, left, and his wife Laureen Harper pose for photographs after visiting Mughal Emperor Humayun's tomb in New Delhi, India, Monday, Nov. 5, 2012. Harper is on a five-day visit to India. (AP Photo/Saurabh Das)

  • Canada’'s Prime Minister Stephen Harper, right, is greeted by member of Parliament and Minister of State for Human Resource Development Shashi Tharoor as he arrives at the Indira Gandhi International Airport in New Delhi, India, Monday, Nov. 5, 2012. Harper is on a five-day visit to India. (AP Photo/Mustafa Quraishi)

  • Canada'’s Prime Minister Stephen Harper, center, and his wife Laureen Ann, right, are greeted by Indian Minister of State for Human Resource Development Shashi Tharoor upon their arrival at the Indira Gandhi International Airport in New Delhi, India, Monday, Nov. 5, 2012. Harper is on a five-day visit to India. (AP Photo/Mustafa Quraishi)

  • Canada'’s Prime Minister Stephen Harper, center, and his wife Laureen Ann wave as they arrive at the Indira Gandhi International Airport in New Delhi, India, Monday, Nov. 5, 2012. Harper is on a five-day visit to India. (AP Photo/Mustafa Quraishi)

  • Prime Minister Stephen Harper shares a plate of samosas with reporters and colleges while on route to India from Ottawa on Saturday, November 3, 2012. While in Asia Harper will also visit the Philippines and Hong Kong.