Kristi Noem Warns Of 'Increased Threat' To The U.S. Over Trump's Decision To Strike Iran

Separately, the State Department also urged Americans overseas to be vigilant.

The U.S. Department of Homeland Security on Sunday warned Americans that the Israel-Iran conflict is “causing a heightened threat environment in the United States” as the world awaits possible retaliation from Tehran over this weekend’s U.S. attack.

The latest National Terrorism Advisory System bulletin was issued by Homeland Security Secretary Kristi Noem about a day after President Donald Trump announced the U.S. hit three Iranian nuclear sites: Fordo, Natanz and Isfahan.

While DHS noted there were “no credible threats” against the U.S. currently, the department would remain on high alert.

“Low-level cyber attacks against U.S. networks by pro-Iranian hacktivists are likely, and cyber actors affiliated with the Iranian government may conduct attacks against U.S. networks,” the bulletin states. “Iran also has a long-standing commitment to target U.S. Government officials it views as responsible for the death of an Iranian military commander killed in January 2020.”

Gen. Qassem Soleimani, who was one of the most powerful figures in the Middle East, was killed by a strike on Baghdad International Airport in Iraq ordered by Trump toward the end of his first term in office, prompting Iran to vow “severe revenge.”