Iran and world powers once again failed on Friday to reach a breakthrough in the Iranian nuclear crisis, AFP reports.
The latest talks in Kazakhstan saw Tehran being criticized for failing to give a clear response to a proposal aimed at breaking the deadlock, the report said.
The powers are seeking answers about a nuclear program that Iran insists is peaceful but world powers fear may hide some military dimensions.
The onus is now on Iran to accept a series of demands that include curbing enrichment activities in exchange for concessions which would ease UN sanctions that have choked the Iranian economy and seen its currency's value plummet.
Iran said its chief negotiator Saeed Jalili opened the negotiations in the city of Almaty with goodwill by presenting a three-point outline of its own vision for how the dispute may be resolved.
"At this morning's meeting, his excellency Dr. Jalili presented specific plans and proposals for starting a new round of cooperation between Iran" and the world powers, his deputy Ali Bagheri told reporters after the first plenary session wound down after three hours.
Western officials, however, said the plan was just a rehash of old ideas that had already been cast aside at a meeting last year in Moscow.
"There has not yet been a clear and concrete response to the E3+3 Almaty I proposal" that the powers made at the last nuclear negotiations at the same venue in February, a Western official said in a statement to AFP.
"Their presentation was pretty much a repetition of what they put forward in Moscow. There were some not fully explained general comments on our ideas," said the official on condition of anonymity.
The day's second plenary session ended after nearly three hours with the two sides at least agreeing to meet for another plenary session on Saturday.
Iran's Bagheri said Jalili presented "detailed" answers to a list of questions from the world powers.
"The answers prompted more questions," Russian news agencies quoted chief Russian negotiator Sergei Ryabkov as saying.
"But this proves that these talks are serious," he added.
The last meeting at the same venue in February ended with unusual expressions of cautious optimism from both sides. Iran described those negotiations as "positive" while the world powers more coolly called them "useful."
But Jalili defiantly indicated going into Friday's session that Tehran had no intention of giving ground on the most important concession demanded by the West.
He told the six powers -- comprised of the five permanent UN Security Council members and Germany and known collectively as the P5+1 -- that Iran demanded an immediate recognition of his country's right to enrich uranium.
The P5+1 grouping is particularly concerned about Iran's enrichment to levels of up to 20 percent and the Fordow fortified bunker where such activity is conducted.
They also want Iran to ship out its existing stockpile of 20-percent enriched material.
(Arutz Sheva’s North American Desk is keeping you updated until the start of Shabbat in New York. The time posted automatically on all Arutz Sheva articles, however, is Israeli time.)