US issues worldwide security alert urging caution as Iran-linked groups may target American interests

The US Department of State issued a worldwide security alert Sunday, urging Americans across the globe to be wary of threats from Iran-linked groups.

"The Department of State advises Americans worldwide, and especially in the Middle East, to exercise increased caution. Americans abroad should follow the guidance in security alerts issued by the nearest U.S. embassy or consulate," the State Department said in a statement.