The nation’s governors have been briefed by the Department of Homeland Security over a “heightened threat environment” after President Donald Trump ordered airstrikes on Iran’s nuclear

The U.S. Department of Homeland Security (DHS) warned on Sunday that the "ongoing Iran conflict is causing a heightened threat environment in the United States," in a post on the National Terrorism Advisory System Bulletin. The post comes hours after Washington struck three key nuclear facilities in Iran Saturday night.

The Department of Homeland Security is warning of a "heightened threat environment" across the United States in response to its attack on Iran over the weekend.