The Federal Bureau of Investigation (FBI) agents visited several Sikh people in California this summer with an alarming message—their lives were also at risk.

According to a report by The Intercept, FBI alerted Sikh community after the assassination of Khalistan leader—a Canadian citizen—Hardeep Singh Nijjar in June this year outside a Sikh temple in British Columbia.

Pritpal Singh—a US citizen and coordinator for the American Sikh Caucus Committee—said that he and two other Sikh Americans received calls and visits from the FBI after Nijjar's death.

In a shocking revelations, similarly, Sukhman Dhami, co-ordinator of Ensaaf, a California-based nonprofit group said Sikhs throughout the US received police warnings about political threats.

Canada Prime Minister Justin Trudeau, in an unexpected diplomatic move, Canada expelled New Delhi’s head of the Research and Analysis Wing (RAW)— India's foreign intelligence agency—stationed in Ottawa accusing India’s involvement in the killing of a Khalistani leader Hardeep Singh Nijjar in June.

The already strained relations between Ottawa and New Delhi took a dramatic new low.

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“Five Eyes” intelligence-sharing alliance is made up of Australia, Canada, New Zealand, the United Kingdom and the United States.