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

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

Tehran threatens to activate ‘sleeper cells’ within the United States to retaliate against an attack on its facilities.

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

As questions linger about the implications of U.S. actions on global affairs, concerns about potential terror threats in Las ...

Following the U.S. strike on Iran's nuclear facilities, Iran responded by launching ballistic missiles at a U.S. base in Qatar. While tensions seem to be easing abroad, concerns are still high here at ...

Daniel Park was arrested at John F. Kennedy International Airport in New York upon returning to the United States after being deported from Poland.

A threat assessment by the Center for Internet Security that was released after the U.S. bombing of Iran's nuclear facilities ...

Some major cities are on high alert after the U.S. struck Iranian nuclear sites over the weekend. Lawmakers on Capitol Hill ...

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

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

THE sleeper cell behind a deadly church bombing near Damascus belonged to the Islamic State group, which had plans to target a Shi’ite shrine in a similar attack, Syria’s Interior Ministry ...