The State Department advises U.S. citizens worldwide to increase vigilance.

The U.S. Department of State issued a global security alert on its official website on the 18th, advising American citizens worldwide to remain vigilant. The alert stated that due to the escalating tension in the Middle East, the security environment remains complex with a possibility of unexpected escalation. American citizens around the world, especially those in the Middle East, are advised to remain vigilant and stay informed about the latest developments by following the news. The alert also mentioned that American citizens abroad should follow the security warning guidelines issued by the nearest U.S. embassy or consulate, as flight cancellations and temporary airspace closures may disrupt travel. "U.S. diplomatic facilities outside of the Middle East have been targeted for attacks. Groups supporting Iran may target U.S. interests overseas, U.S. facilities globally, or American citizens worldwide."