Iran nuclear talks enter ‘critical phase’ three days before deadline

“Obviously we are at a critical stage now,” a Western diplomat said. “It’s become more tense in the final days. But that was always likely to happen.”

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Global powers known as the P5+1 group — Britain, China, France, Germany, Russia and the United States — are seeking to flesh out the final details of a historic accord to curtail Iran’s nuclear programme.

They are seeking an accord by Tuesday’s June 30 deadline, building on guidelines set by a framework deal agreed in Lausanne on April 2.

Kerry told reporters that although he remained “hopeful” there was still “a lot of hard work to do”.

Iranian Foreign Minister Mohammad Javad Zarif agreed, saying negotiators “need to work really hard in order to be able to make progress and move forward”.

But his deputy Abbas Araghchi suggested parts of the Lausanne framework no longer applied because other countries had changed their positions.

“In Lausanne we found solutions to many things, but some issues remained unresolved,” he told an Arabic-language Iranian television channel Al-Alam.

“And now some of the solutions found in Lausanne nolonger work, because after Lausanne certain countries within the P5+1 made declarations… and we see a change in their position which complicates the task.”

Officials have acknowledged the June 30 deadline may slipby a few days, but several diplomats have categorically ruled out any further formal months-long extension of the talks which have dragged for almost two years now.

With diplomatic pressure growing, other ministers from Britain, China, Germany and Russia are due to follow Mogherini to Vienna over the coming days.

French Foreign Minister Laurent Fabius, who flew in yesterday, said at least three “indispensable” demands remained unresolved.

“We want a robust accord that recognises Iran’s right to a civilian nuclear programme, but which guarantees that Iran renounces definitively nuclear weapons,” he said.

Fabius, who met separately with both Zarif and Kerry, stressed there must be “a lasting limitation of Iran’s nuclear capacities in research and production” as well as rigorous inspection of military sites, and a mechanism to quickly reimpose sanctions.

It is hoped a deal would end a standoff dating back to 2002 which has threatened to escalate into war and poisoned the Islamic republic’s relations with the outside world.