Nuclear talks between Iran and six major powers resumed Tuesday for the first time since last June, with the international community presenting a new proposal to Tehran and underlining the "urgent need" for progress. The talks in Kazakhstan's largest city aren't expected to achieve a decisive breakthrough in the decade-long stalemate between the West and Tehran over its nuclear ambitions, according to U.S. and European officials involved in the diplomacy
Nuclear talks between Iran and six major powers resumed Tuesday for the first time since last June, with the international community presenting a new proposal to Tehran and underlining the "urgent need" for progress.

The talks in Kazakhstan's largest city aren't expected to achieve a decisive breakthrough in the decade-long stalemate between the West and Tehran over its nuclear ambitions, according to U.S. and European officials involved in the diplomacy.

But the governments are pressing Iran to commit to a process in the coming months to end the most threatening element of its nuclear program, its production of near weapons-grade fuel, said these officials.

The U.S. and Europeans are willing, in turn, to ease some of the sanctions on Iran that have largely frozen its banks out of the global financial system and caused the collapse in the value of Tehran's currency, the rial, over the past year, officials said.

"Iran needs to understand that there is an urgent need to make concrete and tangible progress in the talks and this meeting in Almaty is a genuine opportunity to engage in serious talks about a concrete confidence-building step," European Union foreign policy chief Catherine Ashton's spokesman told reporters soon after the formal negotiations started in Kazakhstan's largest city.

"I would say that from our perspective, the onus is very much on the Iranians," said the spokesman, Michael Mann. Mr. Mann said the revised offer to Tehran would address "concerns on the exclusive peaceful nature of the Iranian nuclear program" but was also "responsive to Iranian ideas." He did not give details.

Iran's Fars news agency reported that Iran brought several versions of a new package it would propose to its counterparts, the five permanent members of the United Nations Security Council plus Germany, the P5+1 group. Fars said Iran would present the one that fits the offer from the six powers.

An Iranian official said the proposals are based around the framework of ideas put forward at the last talks in Moscow last June which ended without progress.

Over the weekend, Iran's chief nuclear negotiator, Saeed Jalili, said Iran wouldn't make any concessions that limit its right to enrich uranium under the U.N.'s Non-Proliferation Treaty.

"We will listen of course with great interest" to any offer from the Iranians, Mr. Mann said. He said he was unaware of a new Iranian proposal.

The first set of roundtable talks broke up after roughly two and a half hours, officials said. The Iranian team had a bilateral meeting with Chinese officials in the morning while Baroness Ashton met with the negotiators from the P5+1 countries.

U.S. officials have said they are keen for bilateral discussions with the Iranian negotiating team of Saeed Jalili. However, Iran's Supreme Leader Ayatollah Ali Khamenei has dismissed the idea for now and U.S. officials said Monday direct talks in Almaty were unlikely.