The United States has issued a renewed warning to its citizens in the Middle East, urging them to remain vigilant "due to the complex security situation in the region." The notice was distributed to all embassies in the area, including Jerusalem, and warned of the possibility of flight cancellations, traffic disruptions and airspace closures. The U.S. State Department specifically referenced the war Saudi Arabia is waging against the Houthis in Yemen, which could "escalate rapidly beyond the immediate area."

