FBI warned prominent US Sikhs of threats after murder of Hardeep Singh Nijjar in Canada

Revelation comes days after prime minister Justin Trudeau blamed the assassination of the Sikh activist on the Indian government

The FBI warned at least three Americans active in the Sikh community that their lives were in danger in the immediate aftermath of the murder of a Sikh activist in Canada last June.

Canadian prime minister Justin Trudeau has blamed the apparent assassination on the Indian government, as assessment that has reportedly been backed by Canadian and US intelligence sources and has created a rupture in Ottawa's relationship with Indian prime minister Narendra Modi's government.