The F.B.I. and Department of Homeland Security have circled the wagons regarding potential retaliation threats from Iran due to recent military actions, urging heightened alertness amidst escalating tensions.
F.B.I. Alerts Law Enforcement on Rising Retaliation Risks from Iran

F.B.I. Alerts Law Enforcement on Rising Retaliation Risks from Iran
Federal officials emphasize increased vigilance after U.S. airstrikes targeting Iran's nuclear sites.
Federal officials are sounding alarms over the potential for retaliatory actions by Iran following U.S. airstrikes on suspected nuclear facilities in the country. On Sunday, officials from the F.B.I. and the Department of Homeland Security convened with state and local law enforcement to outline these concerns. An internal memo from F.B.I. leadership warned of Iran's historical patterns of targeting U.S. interests in response to international conflicts, suggesting an imminent increase in such activities.
They advised field offices to monitor their intelligence resources closely and collaborate with the Department of Defense, highlighting particularly the U.S. military installations involved in the recent operations against Iran as being susceptible to retaliatory attacks. In a proactive measure, New York City Mayor Eric Adams announced that additional police patrols would be deployed around vulnerable religious, cultural, and diplomatic venues, citing a need for caution in light of the unfolding situation in the Middle East.
The United States has long recognized Iran as a state sponsor of terrorism, and the country is known for supporting a range of militias in the region aimed at bolstering its influence while challenging adversaries such as Israel. Among these groups are Hamas, Hezbollah, and the Houthis from Yemen, all of which could be mobilized in response to U.S. military actions.
Additionally, the Department of Homeland Security released a security bulletin acknowledging the uptick in risks stemming from the conflict with Iran, predicting a rise in cyberattacks orchestrated by pro-Iranian entities. As tensions in the region escalate, both government agencies are urging vigilance and preparedness against potential threats emerging domestically.