Global security alert warns Iran-linked groups may target Americans

The U.S. State Department issued a worldwide security alert urging Americans abroad to exercise heightened caution due to threats from Iran-linked groups, noting that U.S. facilities could be targeted and that periodic airspace closures may disrupt travel. The warning comes on the heels of Iranian threats of retaliation amid rising tensions with the U.S. and Israel, including attacks near a U.S. embassy and Tehran’s pledge of “zero restraint” against perceived adversaries.