Pakistan announces US-Iran talks 'in coming days'

In a statement issued on Monday and published by the semi-official Fars news agency, Iran's Defense Council threatened to deploy naval mines across the "entire Persian Gulf" in response to any land invasion.

The council issued the statement ahead of the potential arrival of a force of U.S. Marines in the region.

"Any attempt by the enemy to target Iran's coasts or islands will, naturally and in accordance with established military practice, lead to the mining of all access routes" in the "Persian Gulf and along the coasts," the council said.

-ABC News' Joe Simonetti

The Israel Defense Forces said in a post to X on Monday that it had launched "a widespread wave of attacks" against Iranian government infrastructure in the capital Tehran.

In a notice on the U.S. State Department official website, the agency is advising 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 statement reads.

The State Department is warning that U.S. diplomatic facilities, including those outside of the Middle East, "have been targeted."

The agency warns that groups in support of Iran "may target other U.S. interests overseas or locations associated with the United States and/or Americans throughout the world."

The Israel Defense Forces said in a statement that it's planning to "deepen" its military actions against Hezbollah in Lebanon.

"We are now preparing to deepen the maneuver and strikes according to an orderly plan. We will not stop until the threat is removed from the borders and long-term security is ensured for the residents of the northern region," the IDF said.

"It is a long battle, and we are prepared for it," the IDF added.

Further details about the operation were not provided.