An Indian national accused of helping plot to kill a U.S. citizen in New York City has been extradited to the U.S. to stand trial. 

A U.S. District Court spokesman said Nikhil Gupta is scheduled to appear Monday in the lower Manhattan courthouse on federal murder-for-hire charges.

The Justice Department alleges that Gupta, 52, is an associate of an Indian government “senior field officer” and that together they and others helped plot the assassination of a Sikh separatist and critic of…