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.

During a visit Sunday to the site of an Iranian missile strike in Arad, in southern Israel, Israeli Prime Minister Benjamin Netanyahu said the strikes were "proof that Iran endangers the entire world."

“If you want proof that Iran endangers the entire world, the last 48 hours have given it. In the last 48 hours, Iran targeted a civilian area. They're doing that as a mass murder weapon. Luckily, no one was killed, but that's due to luck, not their intention. Their intention is to murder civilians," Netanyahu said.

Netanyahu also noted Friday morning's reported launch of two ballistic missiles at a joint U.S.-U.K. military base on the island of Diego Garcia, in the Indian Ocean, some 2,000 miles south of Iran. Neither of the missiles struck the base, nor is it clear how far the missiles traveled.

"I've been warning all the time. They have now the capacity to reach deep into Europe," Netanyahu said, in part. "They are putting everyone in their sights."

"What more proof do you need that this regime that threatens the entire world has to be stopped?" Netanyahu said. "Israel and the United States are working together for the entire world. And it's time to see the leaders of the rest of the countries join up."

-ABC News' Jordana Miller