The two foes have held five rounds of Omani-mediated talks since April, seeking to replace a landmark agreement between Tehran and world powers that set restrictions on Iran's nuclear activities in return for sanctions relief, before US President Donald Trump abandoned the accord in 2018 during his first term.

In a video aired on Iranian state TV, parliament speaker Mohammad Bagher Ghalibaf said that "the US plan does not even mention the lifting of sanctions".

He called it a sign of dishonesty, accusing the Americans of seeking to impose a "unilateral" agreement that Tehran would not accept.

"The delusional US president should know better and change his approach if he is really looking for a deal," Ghalibaf said.

On May 31, after the fifth round of talks, Iran said it had received "elements" of a US proposal, with officials later taking issue with "ambiguities" in the draft text.

The US and its Western allies have long accused the Islamic republic of seeking to acquire nuclear weapons, a charge Iran has consistently denied, insisting that its atomic programme was solely for peaceful purposes.

Key issues in the negotiations have been the removal of biting economic sanctions and uranium enrichment.

Tehran says it has the right to enrich uranium under the nuclear Non-Proliferation Treaty, while the Trump administration has called any Iranian enrichment a "red line".

Trump, who has revived his "maximum pressure" campaign of sanctions on Iran since taking office in January, has repeatedly said it will not be allowed any uranium enrichment under a potential deal.

On Tuesday, Iran's top negotiator, Foreign Minister Abbas Araghchi, said the country "will not ask anyone for permission to continue enriching uranium".

- IAEA meeting -

According to the UN nuclear watchdog, the International Atomic Energy Agency (IAEA), Iran is the only non-nuclear-weapon state in the world that enriches uranium up to 60 percent -- close to the 90 percent threshold needed for a nuclear warhead.

Iran's supreme leader Ayatollah Ali Khamenei on Wednesday rejected the latest US proposal and said enrichment was "key" to Iran's nuclear programme.

The IAEA Board of Governors is scheduled to meet in Vienna starting Monday and discuss Iran's nuclear activities.

On Sunday the Atomic Energy Organization of Iran warned it could reduce its level of cooperation with the UN nuclear watchdog if it adopts a resolution against it.

"Certainly, the IAEA should not expect the Islamic Republic of Iran to continue its broad and friendly cooperation," the Iranian agency's spokesman Behrouz Kamalvandi told state TV.

Araghchi on Friday accused European powers of "opting for malign action against Iran at the IAEA Board of Governors", warning on X that "Iran will react strongly against any violation of its rights".

A quarterly report from the IAEA issued last week cited a "general lack of cooperation" from Iran and raised concerns over undeclared nuclear material.

Tehran has rejected the report as politically motivated and based on "forged documents" it said had been provided by its arch foe Israel.

pdm/ami/dcp

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