National Terrorism Advisory System | Homeland Security
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National Terrorism Advisory System

The National Terrorism Advisory System (NTAS) is designed to communicate information about terrorist threats by providing timely, detailed information to the American public. All Americans share responsibility for the nation's security, and should always be aware of the heightened risk of terrorist attack in the United States and what they should do.

This page contains current NTAS advisories (both Alerts and Bulletins), archived copies of expired advisories, and additional information on the NTAS system.

DHS replaced the color-coded alerts of the Homeland Security Advisory System (HSAS) with the National Terrorism Advisory System (NTAS) in 2011.

There are no current advisories.

  • Subscribe to NTAS Alerts via Email

    Subscribe to NTAS Alerts via email through GovDelivery.

  • Developer Resources

    NTAS resources for developers, including API documentation and the NTAS widget that can be added to any website.

Last Updated: 04/15/2022
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