Russia fears deadline extension amid 'slow' Iran talks progress

VIENNA - Russia's negotiator said on Friday there has been a "very worrying" slowdown in progress in nuclear talks between Iran and six major powers ahead of a 30 June deadline to finalise a historic accord.

"The rate of progress ... is progressively slowing down," Sergei Ryabkov was quoted as saying by RIA Novosti as he arrived for the latest round of talks in Vienna.

"This is very worrying to us because there is very little time before the deadline and we urgently need to enter the final stage."

Another Russian agency, ITAR-TASS, quoted a diplomatic source as saying that the talks - which were ongoing late Friday - are "practically stuck. There is a risk that the deadline will be extended again."

Meanwhile, US Secretary of State John Kerry - upon his release from hospital after breaking his leg - insisted on Friday that he would soon head to Vienna as the deadline to finalise a deal approached.

"I talked to our team in Vienna. I will be absolutely fully and totally engaged in those talks. I am now. I haven't missed a tick," Kerry - on crutches - told reporters as he left Massachusetts General Hospital in Boston.

"I will be travelling over there at the appropriate moment in the next days in order to press forward at this critical moment of the negotiations," said the visibly tired Kerry.

In April, Iran and the five permanent members of the UN Security Council plus Germany agreed in the Swiss city of Lausanne to the outlines of a deal aimed at ending the decade-old standoff over Iran's nuclear programme.

According to this framework, due to be finalised by 30 June, Iran will dramatically scale down its nuclear activities in order to render any dash to making nuclear weapons all but impossible.

In return Iran, which denies wanting nuclear weapons, will see painful sanctions lifted by the six powers - the United States, Russia, China, Britain, France and Germany.

In Washington, State Department spokesman Jeffrey Rathke on Friday admitted the talks were proving "complicated", but nonetheless said the United States believes a deal can still be reached by 30 June. 

"We remain of the view that it's possible to reach - to conclude the talks by June 30th. That remains our focus," Rathke told reporters.

Seen as something of a hawk in the talks, French Foreign Minister Laurent Fabius said on Thursday that the issue of tighter UN inspections of Iran's remaining facilities after the mooted deal was not yet sewn up.

"If we want to be sure that the accord is solid we need to be able to inspect the sites ... We don't yet have this certainty. This is one of the points we are discussing," Fabius told French channel BFMTV and radio station RMC.

"The agreement needs to be verifiable, solid, robust and right now we don't have such a guarantee."

Under the hoped-for deal the UN nuclear watchdog, the International Atomic Energy Agency (IAEA), would keep even closer tabs on Iran.

Iran though is uneasy about this since it would potentially include the IAEA going to sites - including military ones - where it suspects undeclared nuclear activity might be taking place.

Other sticking points are thought to be the procedure for handling possible deal violations and an IAEA probe into allegations of past Iranian efforts to develop a nuclear weapon.

The six powers have said they will only lift sanctions once Iran has taken certain steps and want to retain the ability to "snap back" sanctions if the Islamic republic breaks the agreement.

The deal is also highly complex, comprising a main document of around 20 pages plus five "annexes" totalling an additional 40-50 pages, Iran's lead negotiator Abbas Araghchi said last Saturday.

"Each word of this instrument is being discussed and sometimes quarrelled on," he said. "There are differences but work moves forward."

Spying

Meanwhile on Thursday it emerged that authorities in Switzerland and Austria - which have hosted most of the past 18 months of talks - were investigating possible spying on the negotiations.

This came after Russia-based security firm Kaspersky Lab said a malware dubbed Duqu, a sophisticated spy tool that was believed to have been eradicated in 2012, appeared to have been used to spy on the talks.

The Swiss attorney general's office said it launched a probe on 6 May and conducted a raid six days later, seizing computer equipment, due to "suspicion of illegal intelligence services operating in Switzerland".

Israel, widely assumed to have nuclear weapons itself and which has major misgivings about the mooted deal, denied any involvement.

"We've taken steps throughout the negotiations to ensure that confidential details and discussions remain behind closed doors," US State Department spokesman Rathke said.

Also on Friday, Iran expressed "serious concern" over the cyber-security of the nuclear talks, the semi-official Fars news agency reported.

Fars said the Iranian Foreign Ministry had written to the Austrian and Swiss governments.

"Tehran has also asked to be informed about the results of investigations over the issue," it said.