US embassies in 11 Middle Eastern countries, including Bahrain, Egypt, Iraq, Israel, Jordan, Kuwait, Lebanon, Oman, Qatar, Saudi Arabia, and the United Arab Emirates, posted security alerts on Saturday urging American citizens to be prepared to leave. The warnings cited "heightened tensions" and advised citizens to exercise caution, check flight details, and prepare for potential flight cancellations, airspace closures, and travel disruptions. Specific guidance was given for US citizens in Jordan to avoid military bases that have come under Iranian missile attack, and for those in Israel to locate the nearest bomb shelter.