GENEVA - Iran and six world powers have not reached any deal yet that would end Tehran's decade-long standoff with the West over its nuclear program, US Secretary of State John Kerry said on Friday.
"I want to emphasize there is not an agreement at this point," Kerry told reporters shortly after arriving in Geneva. "I don't think anybody should mistake that there are some important gaps that have to be closed."
Kerry joined fellow big power foreign ministers in Geneva on Friday to help clinch an interim nuclear deal with Iran and ease a decade-old standoff, with Israel warning they were making an epic mistake.
Diplomats said a breakthrough at this week's negotiations remained uncertain and would in any case mark only the first step in a long, complex process towards a permanent resolution of Iran's dispute with the West over its nuclear ambitions.
But they said the arrival of Kerry, British Foreign Secretary William Hague and French and German foreign ministers Laurent Fabius and Guido Westerwelle was a sign that the five permanent UN Security Council members and Germany may be closer to an agreement with Iran than ever before.
Kerry was expected to hold a trilateral meeting with European Union foreign policy chief Catherine Ashton and Iranian Foreign Minister Mohammad Javad Zarif.
A senior US State Department official said Kerry was committed to doing "anything he can" to narrow differences with the Islamic Republic. The powers aim to cap Iran's nuclear work to prevent any advance towards a nuclear weapons capability.
The top US diplomat arrived from Tel Aviv, where he met Prime Minister Binyamin Netanyahu
, who sees Iran's atomic aspirations as a menace to the Jewish state.
The official said Kerry had decided to break off a Middle East visit
to go to Geneva at the invitation of Ashton, who is coordinating the talks with Iran and the six powers.
Netanyahu warned Kerry and his European counterparts that Iran would be getting "the deal of the century" if they carried out proposals to grant Tehran limited, temporary relief from sanctions in exchange for a partial suspension of, and pledge not to expand, its enrichment of uranium for nuclear fuel.
"Israel utterly rejects it and what I am saying is shared by many in the region, whether or not they express that publicly," Netanyahu told reporters.
"Israel is not obliged by this agreement and Israel will do everything it needs to do to defend itself and the security of its people," he said before meeting Kerry in Jerusalem.
Israel is not the only country in the Middle East worried about Iran's nuclear ambitions. Saudi Arabia, Iran's chief rival for regional influence, has made clear to Washington that it does not like the signs of a possible US-Iran rapprochement.
Israel has repeatedly suggested that it might strike Iran if it did not shelve its entire nuclear program and warned against allowing it to maintain what Israel sees as a nascent atomic bomb capability. Iran says its nuclear activities are geared only to civilian needs and has refused to suspend them.
The fact that an accord may finally be feasible after a decade of rhetorical feuding and hostility rather than genuine negotiations between Iran and the West highlighted a striking shift in Tehran's foreign policy since the election in June of a relative moderate, Hassan Rouhani, as Iranian president.
In Iran, Iranian clerics expressed support for the Iranian negotiating team. Friday prayer leader in the town of Meshgin, Gholamreza Baveqar, was quoted by Fars as saying that "the nuclear negotiators are sons of this nation and the Supreme Leader (Ali Khamenei) supports them."
Earlier this week Khamenei gave strong backing to Rouhani's negotiations with the West, warning hardliners not to accuse the president of caving in to the old enemy America.ISRAELI FURY
The negotiations in Geneva involve Iran and the five permanent members of the UN Security Council - the United States, Russia, China, France and Britain - plus Germany. While Iran has in the past suggested expanding the talks to include issues like Afghanistan, Iraq or Syria, the six powers have insisted on keeping them focused on Tehran's nuclear work.
The Islamic Republic, which holds some of the world's largest oil and gas reserves, wants the six powers to lift increasingly tough restrictions that have slashed its daily crude sales revenue by 60 percent in the last two years.
Iran and the powers are discussing a partial suspension deal covering around half a year. If a preliminary deal is nailed down, it would only be the first stage in a process involving many rounds of intricate negotiations in the next few months aimed at securing a permanent agreement.
One of the main ideas under consideration is the disbursement in installments of up to around $50 billion of Iranian funds frozen in foreign accounts for many years. Other ideas included temporarily relaxing restrictions on Iran's trade in petrochemicals and precious metals.
Both sides have limited room to maneuver, as hardliners in Tehran and in Washington could sharply criticize any agreement they believed went too far in offering concessions.
One Western diplomat told Reuters that Israel's fury at the proposed deal might actually make it easier for Rouhani to sell the interim deal to skeptics in Iran's powerful security and clerical elites who are wary of US overtures to Tehran 33 years after Washington broke off diplomatic relations.
Ashton's spokesman Michael Mann told reporters that there was no deal yet and "very intense work is continuing."
France's Laurent Fabius, the first of the Western foreign ministers to arrive in Geneva, said the talks were difficult. "There is progress, but nothing is concluded yet," he said.
Tehran wants respite from a panoply of international sanctions choking its economy. The United States has said world powers will consider some sanctions relief, while leaving the complex web of US, EU and UN restrictions in place, if Iran takes verifiable steps to rein in its nuclear program.
Israel has argued against sanctions relief until Iran has dismantled its enrichment facilities. "The Iranians are walking around very satisfied in Geneva - as well they should be, because they got everything and paid nothing," Netanyahu said.
PHASED SANCTIONS RELIEF?
US President Barack Obama said on Thursday that the world could slightly ease up on sanctions against Iran in the early stages of negotiating a comprehensive permanent deal.
"There is the possibility of a phased agreement in which the first phase would be us ... halting any advances on their nuclear program ... and putting in place a way where we can provide them some very modest relief, but keeping the sanctions architecture in place," he said in an interview with NBC News.
Kerry said that Tehran would need to prove its atomic activities were peaceful, and that Washington would not make a "bad deal, that leaves any of our friends or ourselves exposed to a nuclear weapons program."
"We're asking them to step up and provide a complete freeze over where they are today," he said on Thursday.
In Geneva, Iranian Deputy Foreign Minister Abbas Araqchi was cautious on the chances of an accord. "Too soon to say," he told reporters on Thursday after the first day of talks. "I'm a bit optimistic. We are still working. We are in a very sensitive phase. We are engaged in real negotiations."
Lending urgency to the need for a breakthrough was a threat by the US Congress to pursue tough new sanctions on Iran.
Obama has been urging Congress to hold off on more punitive steps
to isolate Iran, demanded by Israel, to avoid undermining the fragile diplomatic opening with the Islamic Republic.
But many US lawmakers, including several of Obama's fellow Democrats, believe tough sanctions brought Iran to the negotiating table in the first place and that more are needed to discourage it from diverting enrichment toward bombmaking.
Zarif, Tehran's chief negotiator, suggested a partial suspension of Iran's enrichment campaign might be possible - a concession Iran ruled out before Rouhani's landslide election.
Zarif said he hoped the two sides would agree on a joint statement on Friday stipulating goals to be reached "within a limited period of time, hopefully in less than a year", and a series of reciprocal actions they would take "to build confidence and address their most immediate concerns".
Iran and the United States have had no diplomatic ties since soon after the 1979 Islamic Revolution that overthrew the US-backed monarchy, and their mutual mistrust and enmity have posed the biggest obstacle to any historic nuclear settlement.