美政府发布安全警告：美国公民尽快自行离开伊朗，如暂时无法离境，应就地避险

Group 1 - The U.S. State Department issued a security warning urging American citizens to leave Iran promptly due to heightened security measures and ongoing tensions across the country [1][3] - Americans are advised to create exit plans that do not rely on U.S. government assistance and to stockpile necessary supplies while avoiding demonstrations and maintaining a low profile [3] - Dual nationals must exit using an Iranian passport, as Iran does not recognize dual citizenship, and there is a high risk of questioning and detention for U.S. citizens in the region [3] Group 2 - Land borders between Iran and Armenia, as well as Turkey, remain open, while exiting through Turkmenistan and Azerbaijan requires special permission in advance [3] - The U.S. government warns against travel to Afghanistan, Iraq, or the Iran-Pakistan border areas [3] - Due to the lack of diplomatic relations between the U.S. and Iran, the Swiss embassy in Tehran serves as a limited representative for U.S. interests [3]