() On Sunday evening, the State Department issued a “worldwide caution” security alert, almost 24 hours on from attacks on Iranian nuclear sites by the United States.

In a release on its website, the State Department said, “The conflict between Israel and Iran has resulted in disruptions to travel and periodic closure of airspace across the Middle East.  There is the potential for demonstrations against U.S. citizens and interests abroad. 

“The Department of State advises U.S. citizens worldwide to exercise increased caution.  Please read carefully our Travel Advisory, country information, and any recent security alerts when planning travel at 

It follows the Department of Homeland Security’s issuance of a National Terrorism Advisory System Bulletin.

“The ongoing Iran conflict is causing a heightened threat environment in the United States,” the release said. “Low-level cyber attacks against US networks by pro-Iranian hacktivists are likely, and cyber actors affiliated with the Iranian government may conduct attacks against US networks.

“Iran also has a long-standing commitment to target US Government officials it views as responsible for the death of an Iranian military commander killed in January 2020. The likelihood of violent extremists in the Homeland independently mobilizing to violence in response to the conflict would likely increase if Iranian leadership issued a religious ruling calling for retaliatory violence against targets in the Homeland.

“Multiple recent Homeland terrorist attacks have been motivated by anti-Semitic or anti-Israel sentiment, and the ongoing Israel-Iran conflict could contribute to US-based individuals plotting additional attacks.”

Iran has said it will retaliate against attacks on its three nuclear sites in Fordow, Natanz, and Esfahan. Iranian President Masoud Pezeshkian said there will be a response Sunday.

“The U.S. has attacked us; what would you do in such a situation? Naturally, they must receive a response to their aggression,” Iranian President Masoud Pezeshkian said during a call with France’s leader, according to The Associated Press.

Iran’s U.N. ambassador, Amir Saeid Iravani, told an emergency meeting of the United Nations Security Council that the U.S. “decided to destroy diplomacy” and that the Iranian military will decide the “timing, nature and scale” of the country’s “proportionate response.”