Immigration and Customs Enforcement arrested 130 Iranian nationals in the last week, with 670 currently in detention as the ...

The Trump administration has warned of Iranian “sleeper cells” operating in America as the United States braces for Tehran’s response to strikes on three of its nuclear sites over the weekend.

DHS issued a terrorism bulletin with experts warning of Iranian sleeper cells, campus protest infiltration and online ...

Rep. Brian Mast is the latest to express concern over sleeper cells in the United States following its strikes against Iran.

The Iran crisis of the past two weeks isn't just about nuclear weapons — it's also an urgent reminder that border security is national security.

Former DHS chief warns of Iranian sleeper cells after U.S. strikes, calling it a “highest magnitude" threat and urging the public to stay vigilant.