71 killed in Israeli attack on Iran prison, official says

At the NATO Summit in The Hague Wednesday morning, President Donald Trump pointed to a reported statement from the Israel Atomic Energy Commission (IAEC) -- which was circulated by the White House -- to support his assertion that Iran’s nuclear facilities were obliterated in the U.S. strike.

"Great statements just came out from the Israeli Atomic Energy Commission and from Iran, as you know, that it was complete, total destruction," Trump told reporters during a bilateral meeting with Dutch Prime Minister Dick Schoof.

The statement, shared by the White House "on behalf of the Israel Atomic Energy Commission," contradicts early U.S. intel assessments that found Iran’s nuclear program was only set back a few months.

"The devastating U.S. strike on Fordo destroyed the site's critical infrastructure and rendered the enrichment facility inoperable. We assess that the American strikes on Iran's nuclear facilities, combined with Israeli strikes on other elements of Iran's military nuclear program, has set back Iran's ability to develop nuclear weapons by many years," the IAEA said in a statement.

-ABC News’ Fritz Farrow and Lalee Ibssa

The Iranian regime executed three more prisoners on Wednesday over allegedly spying for Israel, according to Mizan, the official news agency of the Islamic Republic judiciary.

Iran’s state-run Press TV claims that more than 700 people with alleged ties to Israel’s Mossad intelligence agency have been arrested in recent days.

-ABC News’ Somayeh Malekian

President Donald Trump again claimed "total obliteration" of Iran's nuclear program during the NATO summit in the Netherlands on Wednesday, dismissing a Pentagon report suggesting the joint U.S.-Israeli strikes on Tehran's facilities may have only set the program back by several months.

"I believe it was total obliteration," Trump told reporters speaking alongside NATO Secretary General Mark Rutte.

Trump was responding to assessments made in a preliminary analysis by the Defense Intelligence Agency and U.S. Central Command. Two people familiar with the report told ABC News it suggested the strikes did limited damage and that Iran was able to relocate highly enriched uranium stocks before the strikes occurred.

"I believe they didn't have a chance to get anything out, because we acted fast," Trump said. "If it would have taken two weeks, maybe. But it's very hard to remove that kind of material, very hard and very dangerous. Plus, they knew we were coming, and if they know we're coming, they're not going to be down there."

Trump insisted Iran's nuclear program had been set back "basically decades," adding, "It's gone for years."

Asked if they could rebuild and whether the U.S. would strike again, Trump said that would be someone else's problem.

"I'm not going to have to worry about that," he said. "It's gone for years, years, very tough to rebuild, because the whole thing is collapsed. In other words, inside, it's all collapsed. Nobody can get in to see it, because it's collapsed."

Asked if he trusted the U.S. intelligence assessment, the president said the initial report was "very inconclusive. The intelligence says we don't know, it could have been very severe, that's what the intelligence says. So I guess that's correct, but I think we can take the 'we don't know.' It was very severe. It was obliteration."

-ABC News' Mary Bruce and Joe Simonetti

As analysis of U.S. and Israeli airstrikes on three key Iranian nuclear facilities continues, Israeli sources gave mixed impressions to ABC News.

One source downplayed the damage at the Fordo uranium enrichment facility -- built hundreds of feet under a mountain southwest of Tehran -- saying the outcome there is "really not good."

Two sources said they do not know how much enriched uranium may have been moved from the sites in advance of the Israeli and American strikes, or how many centrifuges -- used to enrich uranium -- are left and can be made operational in the country.

To establish such details could take months, one source said, or prove impossible.

But an Israeli source with knowledge of the Israeli intelligence assessment gave a more confident read, telling ABC News that the strike on Fordo "got the job done, with the site "damaged beyond repair." The assessment, they added, is based on "excellent" intelligence sources inside Iran, which includes "info from spies, listening in on what the Iranian leaders themselves are saying and cyber spying capabilities."

"You don't have to go down into Fordo to know what happened," the source added. "If Israel was not satisfied with the results of the U.S. strikes, Israel would have bombed Fordow again. The was the central target of the whole operation. And Israel did not bomb it again."

The source also disputed suggestions that Iran had time to move enriched uranium stockpiles out of its nuclear facilities before the strikes. "It was stockpiled at Isfahan, Natanz and Fordow and it's now under the rubble," they said.

Another Israeli source cautioned against decisive assessments. "The most honest are those who say they don't know yet -- anyone who says it was a failure is pushing in the wrong direction, anyone who says it was 100% obliterated is also pushing in the wrong direction," they said.

-ABC News' Ian Pannell and Jordana Miller