The remarks by IAEA chief Grossi were the firmest yet from the United Nations agency, which is viewed as key in determining the status of Iran's nuclear stockpile.
There is deep skepticism among both Republican and Democratic lawmakers, pro-Israel advocates and Israel itself that the deal is realistic, workable or would have any effect on nuclear talks.
Officials with direct knowledge of the negotiations said how Iran will give up its highly enriched uranium is a subject of further negotiations over the course of a 60-day period.
Trump, who has been insisting there is progress in diplomatic talks toward a ceasefire, shared video of the attack on Isfahan, with fiery explosions lighting up the night sky.
Gulf Arab states fear a strike could trigger a wider war, after US forces downed an Iranian drone near the Lincoln and Tehran tried to stop a US-flagged ship in Hormuz.
According to defense officials who spoke to CBS News, Washington had conveyed to Tehran that the strikes were limited and that it had no plans for regime change.
