Afghanistan, March 23 -- The U.S. State Department has issued an emergency advisory urging American citizens worldwide to adopt the highest level of security precautions amid ongoing military tensions with Iran.

The alert, released Sunday evening, comes as confrontations escalate between the U.S.-Israel coalition and Iran. American diplomatic sites and strategic interests, particularly in the Middle East, face serious threats and potential retaliatory attacks.

The advisory warns of possible sudden and temporary airspace closures in some countries, which could disrupt commercial flights and international travel. Citizens are advised to check local consular updates before traveling.

Since February 28, the United States and Israel have carr...