71 killed in Israeli attack on Iran prison, official says

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

The U.S. Embassy in Jerusalem resumed operations on Wednesday and lifted a shelter in place order for employees and their families, as the ceasefire between Israel and Iran appeared to hold.

The embassy urged continued caution and "increased personal security awareness -- including knowing the location of the nearest shelter in the event of a red alert as security incidents, such as mortar, rocket and missile fire and unmanned aircraft system intrusions, often take place without any warning."

Government employees and their families are still restricted from travel outside of the greater Tel Aviv, Jerusalem and Be'er Sheva areas, Wednesday's security notice said.

The embassy's previous security update on June 23 instructed all employees and their families to shelter in place "until further notice" due to the ongoing conflict with Iran.

President Donald Trump doubled down on his claim that Iranian nuclear sites were "completely destroyed" following U.S. strikes on Saturday.

In a social media post late Tuesday, he asserted that the media was trying to "demean one of the most successful military strikes in history."

An early intelligence assessment indicated that the strikes did not fully eliminate the country’s nuclear program and likely only set it back by months, according to two people familiar with an early intelligence assessment.

The report, which is classified, was produced by the Defense Intelligence Agency and U.S. Central Command. The findings could evolve as the Defense Department and the intelligence community collect more information.

-ABC News' Kelsey Walsh

Special Envoy to the Middle East Steve Witkoff suggested Tuesday an initial intelligence assessment of Iran's nuclear capabilities after U.S. strikes was leaked, calling such a move "treasonous."

“Well, it goes without saying that -- that leaking that type of information, whatever the information, whatever side it comes out on, is outrageous," Witkoff said, speaking to Fox News' Laura Ingraham. "It's -- it's treasonous. So it ought to be investigated."

The initial assessment by the U.S. Central Command and the Defense Intelligence Agency concluded that U.S. strikes on Iran's nuclear facilities did not completely destroy the county's nuclear program but likely set it back by a few months.

Witkoff also assured that the ceasefire between Israel and Iran is holding.

"The proof is in the pudding, no one's shooting at each other," he said. "It's over.”

When asked if Iran could resume its nuclear enrichment program within a matter of months, Witkoff said it’s “not even conceivable.”

-ABC News' Kelsey Walsh