When asked about the Iranian attacks on a U.S. base in Qatar, a spokesperson for the Israel Defense Forces said they are "following developments that are being reported" and are "in touch with our partners in the region."

"This is more proof of the violence, that Iran is a terrorist state that threatens not just Israel but the entire Mideast and the world at large." IDF spokesperson Effie Defrin said.

-ABC News' Will Gretsky

Defense Secretary Pete Hegseth and Joint Chiefs of Staff Chairman Gen. Dan Caine were in the Situation Room, a senior Department of Defense official told ABC News.

--Editor's note: This has been corrected to reflect that President Trump was in the Oval Office during the Iranian attack.

Qatari air defenses "successfully intercepted" a missile attack targeting Al Udeid Air Base, the Qatari Defense Ministry said.

The Qatari foreign minister condemned the Iranian attack on Monday, calling it a "flagrant violation of the State of Qatar’s sovereignty and airspace, as well as international law and the United National Charter."

"We affirm that the State of Qatar reserves the right to respond directly in a manner proportionate to the nature and scale of this blatant aggression and in accordance with international law," the foreign minister said.

The foreign minister added that the base had been evacuated earlier "in accordance with approved security and precautionary procedures" and that there were no injuries or human losses as a result of the attack.

A U.S. official also confirmed that the U.S. intercepted Iranian missiles with the Qataris, with no impacts occurring on the base.

-ABC News' Will Gretsky and Luis Martinez

A U.S. official confirmed that Iran has fired missiles at Qatar targeting the Al Udeid Air Base, the largest U.S. military base in the region.

Iran had been preparing missiles to target U.S. military facilities in the region, the official said.

-ABC News' Luis Martinez