An Indian government official directed an unsuccessful plot to assassinate a Sikh separatist, who is also a U.S. citizen, in the United States, the U.S. Justice Department said on Wednesday, in announcing charges against a man accused of orchestrating the attempted murder.

Federal prosecutors in Manhattan said Nikhil Gupta, 52, worked with the Indian government employee, whose responsibilities included security and intelligence, on the plot to assassinate the New York City resident who advocated for a Sikh sovereign state in northern India.

Prosecutors did not name the Indian official or the target, although they did describe the latter as a U.S. citizen of Indian origin. U.S. officials have named him as Gurpatwant Singh Pannun, a dual citizen of the United States and Canada.