71 killed in Israeli attack on Iran prison, official says

President Donald Trump was inside the Oval Office when Iran launched its retaliatory strike on the U.S. base in Qatar, a senior administration official told ABC News.

It occurred when the president received his national security briefing in the Oval Office, as listed on his public schedule.

Joint Chiefs Chair Gen. Dan Caine and Defense Secretary Pete Hegseth tracked the developments in the Situation Room along with other senior officials, according to a senior administration official.

Members of the president's national security team circled in and out of the Oval Office throughout much of the day to provide updates, the official said.

-ABC News' Rachel Scott

Qatar's foreign ministry called for all parties to negotiate while condemning Iran's missile attack on the U.S. base at Al Udeid.

"The continuation of the escalation in the region will only cause the undermining of security and stability not only in this region, but in the whole world," Qatar Foreign Ministry spokesperson Majed bin Mohammed al-Ansari said during a press conference.

He said Iran targeted the base with 12 missiles -- only one of which dropped on the base but "praise be to God, there were no losses."

The U.S. Embassy in Qatar said it’s lifted its shelter-in-place order and plans to reopen on Tuesday.

"Qatari airspace remains closed," the embassy said.

-ABC News’ Shannon Kingston

Iranian officials gave advanced noticed of the retaliatory attacks -- a message that was delivered through Qatar to the United States, multiple sources confirmed to ABC News.

It's unclear when the message was delivered to the U.S., but it was sent with enough time for the U.S. to anticipate the attack, sources said.

President Donald Trump thanked Iran on Truth Social, writing, "I want to thank Iran for giving us early notice, which made it possible for no lives to be lost, and nobody to be injured."

-ABC News’ Rachel Scott and Shannon Kingston