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Story summary
- The U.S. State Department issued a security alert on March 26, 2026, urging Americans in Iran to shelter in place amid escalating tensions.
- The alert follows a March 22 worldwide caution warning of terrorism and arbitrary detention.
- Americans are urged to avoid travel to Iran and other high-risk countries, including Afghanistan and Iraq, with a Level 4 advisory.
- Citizens in Iran should have essential supplies ready if they remain.
