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.

President Donald Trump said that "most of our NATO 'allies'" do not want to join the U.S. and Israel's war against Iran.

Trump claimed allies' refusal to join is "despite the fact that almost every Country strongly agreed with what we are doing, and that Iran cannot, in any way, shape, or form, be allowed to have a Nuclear Weapon," he wrote in a post on social media.

"Because of the fact that we have had such Military Success, we no longer 'need,' or desire, the NATO Countries’ assistance — WE NEVER DID! Likewise, Japan, Australia, or South Korea .... WE DO NOT NEED THE HELP OF ANYONE!" he said in the post.

French President Emmanuel Macron said the country would never take part in operations to unblock the Strait of Hormuz, and that it is carrying on with work to prepare a coalition that could provide freedom of navigation once hostilities ended, according to Reuters.

"We are not party to the conflict and therefore France will never take part in operations to open or liberate the Strait of Hormuz in the current context," Macron said at the start of a cabinet meeting to discuss the conflicts in the Middle East, according to Reuters.