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."

Officials in Abu Dhabi said in a statement that one person was injured due to falling debris from a missile attack in the Al Shoamkh area.

UAE air defences responded to incoming missile and drone threats from Iran, officials said.

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.

Secretary of Defense Pete Hegseth said he joined President Donald Trump at Dover Air Force Base in Delaware on Wednesday to honor the six service members killed when their KC-135 refueling aircraft crashed in western Iraq last week.

"We grieved with their families, and we listened what I heard through tears, through hugs, through strength and through unbreakable resolve. Was the same from family after family, they said, 'Finish this. Honor their sacrifice. Do not waver. Do not stop until the job is done,'" Hegseth said at a Pentagon briefing Thursday.

"My response, along with that of the president, was simple, of course, 'we will finish this. We will honor their sacrifice,'" Hegseth said.