American citizens are asked to leave Iran immediately.

According to US media reports, the US State Department has issued an emergency security alert, requiring American citizens to "immediately leave Iran, develop a departure plan that does not rely on assistance from the US government; if unable to leave, stay in residence or other secure buildings, and stock up on food, water, medicine, and other necessities; avoid participating in any demonstrations, keep a low profile, be aware of their surroundings; monitor local media for the latest information and adjust plans as necessary; keep their phone charged, stay in touch with family and friends, and inform them of their situation promptly."