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

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

The Trump administration has warned of Iranian “sleeper cells” operating in America as the United States braces for Tehran’s ...

A CBP memo suggests “the threat of sleeper cells ... has never been higher,” even as it says it has no “specific credible ...

The U.S. strike against Iran on Saturday night has ignited fears that Iran may choose to orchestrate attacks against ...

Sleeper cells are spies or terrorists who operate in rival countries and remain inactive until they are essentially ordered ...

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

Over the past four years, thousands of Iranian national have been documented entering the United States illegally and ...

A recent CBP memo warns that the threat posed by Iranian sleeper cells or sympathizers inside the United States "has never ...

A sniper. A convicted felon with Hezbollah ties. A U.S. citizen who allegedly threatened to shoot ICE officers. These are ...

A devastating church bombing near Damascus, executed by an Islamic State sleeper cell, killed at least 25 people. Authorities ...