Axios: US envoys consult nuclear experts as Iran talks near final stage

U.S. envoys Steve Witkoff and Jared Kushner visited nuclear facilities in Oak Ridge, Tennessee, on Thursday, June 4, to consult technical experts as the White House pushes toward a preliminary agreement with Iran, U.S. officials told Axios.

The visit comes as Washington seeks to finalise a 60-day memorandum of understanding (MOU) with Tehran aimed at extending a ceasefire, reopening the Strait of Hormuz, allowing Iranian oil exports, and launching detailed negotiations over Iran’s nuclear program.

Officials say talks are in their final phase, though key differences remain. “This meeting in Oak Ridge doesn't mean that a deal is going to happen, but it is a sign that the negotiations are in a very serious phase and that there is a good chance to get it done, and we want to be prepared,” a U.S. official said.

The Oak Ridge National Laboratory and Y-12 National Security Complex host leading U.S. experts in uranium processing and centrifuge technology. Officials said a team of around 100 specialists has been assembled to support negotiations and potential implementation of a deal, including planning for the disposal of enriched uranium and verification mechanisms.

Witkoff and Kushner’s trip was aimed at coordinating with this team ahead of a possible second phase of talks.

Despite progress, disagreements persist over timelines and financial terms. The U.S. has proposed a 60-day deadline for reducing Iran’s enriched uranium stockpile, while Iran is seeking 90 days, sources said. There are also differences over the release of frozen Iranian funds, with Washington favouring phased relief tied to compliance, and Tehran seeking immediate access to some assets.

An adviser to Iran’s supreme leader told CNN the talks were stalled over the issue of frozen funds, adding that “the ball is in Trump's court.”

U.S. officials say they have received generally positive signals from Iranian negotiators but believe internal divisions in Tehran could affect the outcome.

By Tamilla Hasanova