The U.S. has intercepted Iranian missiles fired in the region overnight but at the moment there does not appear to have been any major damage or impacts at U.S. facilities, according to a U.S. official.

-ABC News' Luis Martinez

U.S. military strikes against Iran on the second night in a row have been completed, U.S. Central Command said.

In a statement, CENTCOM said U.S. forces "completed additional self-defense strikes against multiple targets," including against Iranian military surveillance capabilities, communication systems and air defense sites.

The statement went on to say: "U.S. Marine Corps, Air Force, and Navy assets fired precision munitions on Iranian targets that posed a threat to U.S. forces and international commercial ships transiting regional waters. The strikes are in response to Iran's unwarranted and continued aggression. U.S. forces remain vigilant, lethal, and ready."

U.S. Central Command is denying Iran's claim that the Strait of Hormuz is closed, saying that commercial ships continue to transit in and out of the waterway.

Iran vowed to "give a crushing and decisive response" to the U.S. strikes, according to Iran's Fars News Agency state media.

Defense Secretary Pete Hegseth said the U.S. military "will be busy tonight" in Iran during remarks after visiting the U.S. Central Command headquarters in Tampa, Florida, on Wednesday.

"Central Command will be busy tonight because President Trump said we will be hitting Iran hard, and we will be. Because Iran has a chance to make a good deal, a great deal to codify what they said they've been willing to do, and they haven't been willing to do it," Hegseth told reporters.

"As President Trump said, they've been tap, tap, tapping. You can see when someone's trying to tap, tap, tap on a deal. Instead, they're going to have tap, tap, tap bombs dropping on key facilities in Iran from the United States of America," Hegseth continued. "And that's not because we want to restart anything we don't have to restart. It's because we are, the War Department is prepared to set the terms to ensure that we get the kind of deal President Trump expects."