Trump says damage to Iran's nuclear sites is 'far below ground level'

Iran's Foreign Minister Abbas Araghchi said in a post to X in the early hours of Sunday that the U.S. strikes on Iranian nuclear sites were "outrageous and will have everlasting consequences."

"Each and every member of the UN must be alarmed over this extremely dangerous, lawless and criminal behavior," Araghchi said.

"In accordance with the UN Charter and its provisions allowing a legitimate response in self-defense, Iran reserves all options to defend its sovereignty, interest and people," he added.

Israeli President Isaac Herzog thanked President Donald Trump for ordering American airstrikes on Iran's nuclear program, framing the attack as "a moment in which the principles of freedom, responsibility and security prevailed."

"This critical action serves the security interests of the entire free world," Herzog said in a post to X. "I hope it will lead to a better future in the Middle East -- and will also assist in the urgent release of our hostages from captivity in Gaza."

Israeli airspace is closed for both inbound and outbound flights, according to the Israel Airports Authority.

Land border crossings to Sinai and Jordan are operating as usual, the IAA said.

-ABC News' Will Gretsky

A Washington Post poll conducted earlier this week, ahead of the U.S. strikes, found that more Americans opposed than supported potential airstrikes against Iran.

The poll, conducted on Wednesday, asked, "At this time, would you support or oppose the U.S. military launching airstrikes against Iran over its nuclear program?"

The poll found that 45% oppose, 25% support and 30% are unsure.