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.

Dubai International Airport began resuming some flights on Monday morning after a drone impact had sparked a fire nearby, airport and city officials said.

"Dubai Airports confirms the gradual resumption of some flights to and from Dubai International (DXB) to selected destinations, following the temporary suspension implemented as a precautionary measure," a Dubai Airports spokesperson said, according to an alert on the airport’s website.

The Dubai Media Office said hours earlier that authorities were responding to an incident involving a drone near the airport. Firefighters had been battling a blaze, the office said.

"Dubai Civil Defence teams have successfully contained the fire resulting from impact to one of the fuel tanks in the vicinity of Dubai International Airport," the office said early on Monday on social media. "No injuries have been reported."

Some flights were diverted to Al Maktoum International Airport, the office said.

-ABC News' Jessica Gorman