VIENNA  – The 35- nation board of the UN nuclear watchdog censured Iran on Thursday for defying international demands to curb uranium enrichment and failing to address mounting disquiet about its suspected research into atomic bombs.

Two days after Israel ramped up threats to attack Iran, the board overwhelmingly passed a resolution voicing “serious concern” about Tehran’s nuclear advances but also making clear its desire for a peaceful resolution of the row.

Russia and China joined four US-led Western powers in sponsoring the resolution to display big power unity on Iran. Only Cuba voted against. Three countries, including Egypt, abstained, according to diplomats who took part in the closed-door meeting at International Atomic Energy Agency headquarters in Vienna.

“The diplomatic pressure on Iran is increasing. The isolation is increasing,” US envoy Robert Wood said.

But Tehran’s envoy to the IAEA, Ali Asghar Soltanieh, said such resolutions were counterproductive. Iran has sallied ahead with its nuclear program despite a series of similar resolutions since 2006 as well as harsh economic sanctions.

The difference now, though, is that the need for a diplomatic breakthrough is becoming urgent given Israel’s increasingly strident demand that Iran be set a deadline to cooperate or risk the Jewish state launching air strikes that many fear could ignite a devastating Middle East war.

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“[The IAEA resolution] will only complicate the situation and jeopardize the cooperative environment which we desperately need,” Soltanieh told reporters after the vote.

The resolution faults Iran for ignoring UN Security Council calls on it to suspend uranium enrichment and open up to investigations of signs that it seeks nuclear arms know-how.

Six world powers had tabled a resolution text on Wednesday, aiming to raise pressure on Iran to relent, a day after Israel signaled it was almost out of patience with the use of diplomacy and sanctions to try to rein in the Islamic Republic.

South Africa, like Iran a member of the Non-Aligned Movement of mostly developing nations, earlier plunged the meeting into confusion by putting forward an amendment which some Western diplomats said might have weakened the language towards Iran.

But a compromise was hammered out during a threehour adjournment of the meeting, the diplomats said, satisfying the US, Russia, France, China, Britain and Germany.

The amendment concerned a section of the text demanding that Iran immediately implement a yet-to-be agreed framework accord with the IAEA on how the agency should conduct its investigation into suspected nuclear explosives research in the Islamic state.

The compromise changed the original text but not as far as the South African proposal, easing Western fears that it could lower the heat on Tehran to come clean with IAEA sleuths.

The IAEA has tried in a series of high-profile meetings with Iran that began in January to agree a “Structured Approach” on how to carry out its inquiry.

IAEA director-general Yukiya Amano said this week that no concrete results had been achieved, calling the lack of progress “frustrating.”

“Iran has not engaged seriously and without preconditions in talks aimed at restoring international confidence in the exclusively peaceful nature of its nuclear program,” the 27-nation European Union said in a statement to the board. “Iran’s procrastination is unacceptable.”

Wood, the US envoy, accused Iran of “systematically demolishing” a facility at the Parchin military site that IAEA inspectors want to visit as part of their investigation.

“Iran has been taking measures that appear consistent with an effort to remove evidence of its past activities at Parchin,” he told the board gathering.

Soltanieh dismissed what he called the “noise about cleaning” and “distorted information” about Parchin, a vast military complex southeast of Tehran where the IAEA suspects Iran has carried out explosives tests relevant for atom bombs.

Israel has recently ratcheted up its criticism of Iran and of the international community for not doing more to stop its nuclear ambitions.

Intelligence Agencies Minister Dan Meridor publicly disagreed on Thursday with Prime Minister Binyamin Netanyahu’s call for Iran to be confronted with a “red line” beyond which its nuclear program would face military attack.

He called for international sanctions against Tehran to be intensified “so it understands that the price it is paying is mounting and that the only way to be rid of it is to stop the [nuclear] race, to arrive at an agreement, or an international understanding, that it is calling it quits.”

Meridor, part of the security cabinet, took a more moderate view of a nuclear-armed Iran than the premier, who has likened that prospect to a second Holocaust.

“I don’t want to speak in apocalyptic... Holocaust terms,” Meridor said. “I think that we are strong and we will overcome the challenges, but this is a serious challenge.”

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