A day after President Trump declared that Iran’s nuclear program had been “completely and totally obliterated” by American bunker-busting bombs and a barrage of missiles, the actual state of the program seemed far more murky, with senior officials conceding they did not know the fate of Iran’s stockpile of near-bomb-grade uranium.

“We are going to work in the coming weeks to ensure that we do something with that fuel and that’s one of the things that we’re going to have conversations with the Iranians about,” Vice President JD Vance told ABC’s “This Week” on Sunday, referring to a batch of uranium sufficient to make nine or 10 atomic weapons. Nonetheless, he contended that the country’s potential to weaponize that fuel had been set back substantially because it no longer had the equipment to turn that fuel into operative weapons.

The Iranians have made it clear they are not interested in having conversations with the United States, accusing Washington of deceiving Tehran during the last set of negotiations while planning the air attack. Moreover, that stockpile of fuel is now one of the few nuclear bargaining chips in Iranian hands.

In a briefing for reporters on Sunday, Defense Secretary Pete Hegseth and the new chairman of the Joint Chiefs of Staff, Dan Caine, avoided Mr. Trump’s maximalist claims of success. They said an initial battle-damage assessment of all three sites struck by Air Force B-2 bombers and Navy Tomahawk missiles showed “severe damage and destruction.”

Satellite photographs of the primary target, the Fordo uranium enrichment plant that Iran built under a mountain, showed several holes where a dozen 30,000-pound Massive Ordnance Penetrators — one of the largest conventional bombs in the U.S. arsenal — punched deep holes in the rock. The Israeli military’s initial analysis concluded that the site, the target of American and Israeli military planners for more than 26 years, sustained serious damage from the strike but had not been completely destroyed.

But there was also evidence, according to two Israeli officials with knowledge of the intelligence, that Iran had moved equipment and uranium from the site in recent days. And there was growing evidence that the Iranians, attuned to Mr. Trump’s repeated threats to take military action, had removed 400 kilograms, or roughly 880 pounds, of uranium enriched to 60 percent purity. That is just below the 90 percent that is usually used in nuclear weapons.