Here are the top 10 points in this big story:
Justin Trudeau today repeated his charge that "Indian government agents" were involved in the June killing of Hardeep Singh Nijjar, a Canadian citizen who was a wanted terrorist in India. He said there are "credible reasons to believe" so, but did not give any evidence.
India has angrily rejected the allegation and flagged "politically condoned hate crimes and criminal violence" in Canada. The government said Canada has not shared any information regarding Nijjar's killing.
India also alleged "Canadian diplomatic interference" in its internal affairs and sought to reduce the number of Canadian diplomats working in the country. The foreign ministry said the Canadian diplomatic presence in India is larger than what India has and needs to be downsized.
The government has suspended visa services in Canada citing "security threats" that are not allowing their officials to carry out visa functions. "You are aware of the security threats being faced by our High Commissions and Consulates in Canada... this has disrupted their normal functioning," the foreign ministry said.
The diplomatic row blew up Tuesday with both countries expelling senior diplomats and issuing travel advisories. India has asked its citizens living in Canada and those travelling there to exercise "utmost caution" in view of growing anti-India activities.
The two countries had tensions brewing after Prime Minister Narendra Modi scolded Trudeau at the Delhi G20 summit over Khalistan supporters attacking Indian diplomatic missions in Canada. Days later, Canada had postponed a trade mission to India, planned for October.
The India-Canada ties hit a new low after Trudeau linked "Indian agents" to the shooting of Nijjar outside a gurdwara in Surrey. Providing no evidence, he said his government had "credible allegations" of it. India rejected the charge as "absurd".
The US has said that it is in touch with both India and Canada over the issue and that both the countries are important for it. US National Security Advisor Jake Sullivan said the US supports the efforts that are being taken in the investigation and perpetrators held to account.
Voices within the country remain united over the issue. Opposition Congress has backed the government and said that the country's interests and concerns must be kept paramount at all times. Parliamentarian Shashi Tharoor said there is no evidence of any government body linked to the terrorist's killing.
Canada has been among the favoured hubs of expat Sikhs where extremism has mushroomed over the last few years. The past few months saw multiple Khalistani activities in Canada, including protests outside the Indian Embassy and threat posters for Indian diplomats.
Featured Video Of The Day
Anti-Israel Riots Rage In Montreal. Trudeau Spotted At Taylor Swift Concert Trudeau Calls His Officials "Criminals", Media "Wrong" Over Leaks, Fake Report On Indian Leadership PM Modi, Justin Trudeau Together In G20 Family Photo Amid India-Canada Rift "Moving Towards One Party, One Nation": Uddhav Thackeray On BJP Victory After Mega Maharashtra Victory, NDA's Oath Ceremony Likely Tomorrow With Thumping Win, Maharashtra Decides Real NCP, Sena 2 More Babies Die, Deaths In UP Hospital Fire Rises To 17 Sea Nomads, Once Masters In Water, Now Forced To Abandon Oceanic Life 163 Kg Employee Sues Company For Over Rs 38 Crore, Says Desk Too Small Track Latest News Live on NDTV.com and get news updates from India and around the world.