US authorities have thwarted a plot to kill a Sikh separatist in the United States and issued a warning to India over concerns the government in New Delhi was involved, the Financial Times reported on Wednesday, citing unnamed sources.
There was no immediate response from India's Foreign Ministry on the report.
The FT report says that the US protest was issued after Prime Minister Narendra Modi visited Washington in June.
The FT report said that the target of the plot was Gurpatwant Singh Pannun, an American and Canadian citizen who is general counsel for Sikhs for Justice.
The National Investigation Agency (NIA) registered a case against 'listed individual terrorist' Pannun of the SFJ over his latest viral video threatening the passengers flying in Air India and the airlines with a global blockade and closure of its operations from November 19. The anti-terror agency made the announcement on Monday.
The report comes two months after Canada said there were "credible" allegations linking Indian agents to the June murder of a Sikh separatist leader in a Vancouver suburb. India has rejected Canada's accusations.