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on Monday said an agreement with world powers to revive the was still not in sight, blaming the United States for the delay.

"More than one issue is still pending between Iran and the United States," Iranian foreign ministry spokesman said.

"Messages [from Washington]Ìýsent through [European Union coordinator Enrique]ÌýMora these past weeks…Ìýare far from providing solutions that could lead to an accord," he told reporters.

Iran has been engaged in efforts to revive the Joint Comprehensive Plan of Action (JCPOA) with Britain, China, France, Germany and Russia directly, and the United States indirectly since April 2021.

Mora, who coordinates the indirect US-Iran talks, visited Tehran last month for talks with Iranian officials, and later went to Washington.

At the time, Mora said he hoped to close the gaps remaining in the arduous negotiations.

The agreement fell apart in 2018, when then-President Donald Trump withdrew the United States and reimposed crippling economic sanctions.

Iran, in response, began rolling back on most of its commitments under the accord.

Khatibzadeh on Monday blamed Washington for delays inÌýrestoringÌýthe nuclear deal.

The intended aim of the was to discuss solutions to security threats, but this was completely undermined by the absence of Palestine and the reluctance of the US to confront Iran. looks at the ins & outs of the historic event 👇

— °®Âþµº (@The_NewArab)

"The United States are responsible for these delays, because they are taking their time to give replies" that would be suitable for Iran, he said.

Earlier this month, Khatibzadeh's counterpart in the State Department, , said it was Tehran that was not giving way to make a deal possible, but that Washington still believed there was "opportunity to overcome our remaining differences."

Key among unresolved issues is a demand by Tehran that the Islamic Revolutionary Guard Corps, the ideological arm of Iran's military, be removed from a US terror blacklist.

Washington has resisted the move.