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.

An Iranian drone struck a Saudi Aramco refinery in Yanbu, on the Red Sea, on Thursday, according to the Saudi Ministry of Defense.

"A drone fell in the Samref refinery and the damage is being assessed," the ministry said in a statement.

Iran's Islamic Revolutionary Guard Corps had issued warnings for several Gulf energy production sites, including the refinery in Yanbu, after Wednesday’s Israeli strikes on the South Pars Gas Field, the largest in Iran.

Kuwait earlier on Thursday said an Iranian drone had struck one of its refineries.

-ABC News' Lama Hasan and Zoe Magee