President Donald Trump announced his appointments to an advisory council inside the Department of Homeland Security on ...

The scheme was revealed to law enforcement by an accused Iranian government asset who spent time in American prisons for ...

The Department of Homeland Security issued an advisory June 22 warning Americans cyber attacks are likely, and violence in ...

The United States is warning of a “heightened threat environment” after President Trump ordered strikes on three Iranian ...

The U.S. Department of Homeland Security (DHS) warned on Sunday that the "ongoing Iran conflict is causing a heightened ...

The Department of Homeland Security has issued a National Terrorism Advisory System bulletin warning of increased ...

The U.S. Department of Homeland Security (DHS) warned over the weekend of escalating cyberattack risks by Iran-backed hacking ...

Sources told NBC News Iran sent a communication to President Trump last week, threatening to activate sleeper-cell terror ...

Lawmakers and locals are reacting after Saturday's strikes on nuclear facilities in Iran by the United States.

A new bulletin from DHS warns Americans of increased threats after U.S. strikes on Iran, and outlines what could happen next.

We’re overdue for a conversation about the Trump administration’s capacity to deal with what Homeland Security called a “heightened threat environment.” ...

WASHINGTON (Reuters) -U.S. Immigration and Customs Enforcement officials have arrested 11 Iranian nationals in the country illegally, the U.S. Department of Homeland Security said in a statement on ...