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The U.S. Department of Homeland Security (DHS) has issued a new National Terrorism Advisory System (NTAS) bulletin, warning of a “heightened threat environment” across the United States following escalating conflict between the U.S. and Iran.
The bulletin, effective through September 22, 2025, cites increased risk of cyberattacks and potential retaliatory violence on U.S. soil. It comes in the wake of recent U.S. military strikes on Iranian nuclear facilities, which have further strained international tensions.
Key Threats Identified
- Cyberattacks by pro-Iranian hackers and Iran-affiliated cyber actors targeting U.S. networks are “likely.”
- The Iranian regime may attempt to retaliate against U.S. officials, particularly in response to the 2020 drone strike that killed Qassem Soleimani.
- Violent extremists in the Homeland could be inspired by the conflict, especially if Iran issues a formal call for retaliatory action.
- The bulletin notes a potential increase in antisemitic or anti-Israel attacks from U.S.-based individuals.
Ongoing Concerns
Since 2020, U.S. authorities have disrupted several Iranian-backed plots. DHS highlights previous attempts to target dissidents and critics of the regime living in the U.S., as well as potential use of religious rulings by Iran’s leadership to incite violence.
Terror-linked groups such as HAMAS, Hizballah, the Houthis, and others have released statements threatening U.S. interests, further exacerbating the threat level.
DHS Safety Recommendations
Citizens are urged to:
- Stay informed through local authorities and public safety officials.
- Follow cybersecurity best practices as outlined by the Cybersecurity and Infrastructure Security Agency (CISA).
- Report suspicious activity to law enforcement via 911, FBI Field Offices, or the Nationwide SAR Initiative (NSI).
The advisory reiterates the government’s longstanding message: “If You See Something, Say Something®.”
For more information, visit DHS.gov/advisories.
