France warned of serious stumbling blocks to a long-sought accord with Iran as unity among Western powers seemed to fray in talks on getting Tehran to curtail a nuclear programme seen as a bomb risk in exchange for relief from economic sanctions.

Iranian media quoted the Islamic Republic’s Deputy Foreign Minister, Abbas Araqchi, as saying “the issues are serious and there is still a gap in stances”, and that the talks would probably end later in the day and be resumed at a later date.

As discussions stretched on, French Foreign Minister Laurent Fabius was doubtful whether they would soon succeed in nailing down an interim deal that would begin to defuse fears of a stealthy Iranian advance towards nuclear arms capability.

“As I speak to you, I cannot say there is any certainty that we can conclude,” Fabius said on France Inter radio, stressing that Paris could not accept a “sucker’s deal”.

His pointed remarks hinted at a rift brewing within the Western camp. A Western diplomat close to the negotiations said the French were trying to upstage the other powers.

“The Americans, the EU and the Iranians have been working intensively together for months on this proposal, and this is nothing more than an attempt by Fabius to insert himself into relevance late in the negotiations,” the diplomat told Reuters, speaking on the condition of anonymity.

In a further indication that the atmosphere of cordiality that reigned in the first round of talks last month and first two days of discussions this week was dissipating, Araqchi complained to Mehr news agency that his counterparts from the six powers “need constant coordination and consultation in order to determine (their) stances”.

The main sticking points appeared to include calls for a shutdown of an Iranian reactor that could eventually help produce weapons-grade nuclear fuel, the fate of Iran’s stockpile of higher-enriched uranium and the nature and sequencing of relief from economic sanctions sought by Tehran.

Paris could not accept a ‘sucker’s deal’

US Secretary of State John Kerry said on Friday there were “some very important issues on the table that are unresolved. It is important for those to be properly, thoroughly addressed”.

He avoided the media yesterday before engaging in another two hours of intensive talks with Iranian Foreign Minister Mohammad Javad Zarif and EU foreign policy chief Catherine Ashton. The three met for five hours on Friday night.

British Foreign Secretary William Hague said the talks have achieved “very good progress” but much more needed to be agreed and it was unclear if this would happen by the end of the day.

“We are very conscious of the fact that real mom-entum has built up in these negotiations,” he told reporters.

“So we have to do everything we can to seize the moment.”

Foreign ministers from all five permanent UN Security Council members – Britain, China, France, Russia and the US – and Germany were due to take part in yesterday’s talks with Zarif.

Sign up to our free newsletters

Get the best updates straight to your inbox:
Please select at least one mailing list.

You can unsubscribe at any time by clicking the link in the footer of our emails. We use Mailchimp as our marketing platform. By subscribing, you acknowledge that your information will be transferred to Mailchimp for processing.