TEHRAN (AFP) - The UN nuclear watchdog's chief held high-level talks with Iranian officials in Tehran on Saturday (March 5) that are seen as crucial in efforts to revive a 2015 nuclear deal.
The visit by International Atomic Energy Agency head Rafael Grossi comes after Britain, one of the parties to parallel talks on the deal in Vienna, indicated an agreement was close.
The accord has been hanging by a thread since the US's unilateral withdrawal in 2018 under then-president Donald Trump.
"This is a critical time but a positive outcome for everyone is possible," Grossi tweeted on Friday before leaving for Iran
Grossi held talks on Saturday with Mohammed Eslami, president of the Atomic Energy Organisation of Iran, ahead of a meeting with Foreign Minister Hossein Amir-Abdollahian, states news agency IRNA said.
The 2015 deal was aimed at guaranteeing that Tehran could not develop a nuclear weapon - something it has always denied wanting to do.
The next few days are widely seen as a crunch point for negotiations on reviving the accord formally known as the Joint Comprehensive Plan of Action, or JCPOA.
"We are close. E3 negotiators leaving Vienna briefly to update ministers on state of play," head of the British delegation Stephanie Al-Qaq said on Friday, referring to negotiators from Britain, France and Germany.
She added that they were "ready to return soon".
The three European countries, along with counterparts from China, Iran and Russia, have been taking part in the latest round of talks in the Austrian capital since late November, with the United States participating indirectly.
Grossi had vowed earlier this week that the IAEA would "never abandon" its attempts to get Iran to clarify the past presence of nuclear material at several undeclared sites.
Iran has said the closure of the probe is necessary to clinch a deal.
Behrouz Kamalvandi, deputy head of the Iranian atomic agency, told the media he was hopeful Iran would reach an agreement with the IAEA during Grossi’s visit.
Iranian newspapers Etemad and Iran echoed his comments, with the former saying “Tehran and the IAEA could reach a roadmap to resolve the problem within a limited time”.
Grossi is expected to hold a press conference on his return to Vienna.
'Ready to go to Vienna'
The JCPOA, signed in 2015, secured sanctions relief for Iran in return for strict curbs on its nuclear programme.
It began unravelling when then-US president Donald Trump withdrew in 2018 and reimposed sanctions, prompting Iran to start disregarding the limits on its nuclear activity.
The coming days are seen as pivotal by the West because of the rate at which Iran is making nuclear advances.
Its stockpile of enriched uranium has now reached more than 15 times the limit set out in the 2015 accord, the UN's IAEA nuclear watchdog said earlier this week.
Several observers believe that the West could leave the negotiating table and chalk the deal up to a failure if a compromise is not reached by this weekend.
The EU has been chairing nuclear deal negotiations and the bloc's foreign policy chief Josep Borrell said on Friday he "hopes to have results this weekend" to "resurrect the agreement".
He stressed that there was "still work ongoing".
Earlier on Friday, Iran's Foreign Minister Hossein Amir-Abdollahian said he was prepared to travel to the Austrian capital if a deal is reached.
"I am ready to go to Vienna when the Western sides accept our remaining red lines," he said in a phone call with Borrell.
While Amir-Abdollahian did not define the "red lines", Iran has repeatedly demanded the right to verify the removal of sanctions and for guarantees the US will not repeat its withdrawal from the agreement.
On Thursday, US State Department deputy spokeswoman Jalina Porter said negotiators were "close to a possible deal", but that "a number of difficult issues" remained unresolved.
However, "if Iran shows seriousness, we can and should reach an understanding of mutual return to full implementation of the JCPOA within days", she added.