Iran said on Monday the United States should lift sanctions first if it wants to hold talks with Tehran to salvage the 2015 nuclear deal with world powers that former President Donald Trump abandoned.
President Joe Biden has said Washington is ready for talks about both nations resuming compliance with the pact, under which Tehran secured an easing of sanctions by limiting its nuclear work. But each side wants the other to move first.
The West fears Iran wants to build nuclear weapons, while Tehran says that has never been its goal.
"President Joe Biden's administration should change Trump's maximum pressure policy towards Tehran ... If they want talks with Iran, first they should lift sanctions," Foreign Ministry spokesman Saeed Khatibzadeh said.
Washington said on Sunday it was disappointed by Tehran's refusal to hold talks but was ready to "re-engage in meaningful diplomacy" and would consult with major powers.
While Iran has been demanding the lifting of US sanctions first, Washington says Tehran must return to compliance with the deal, which Iran has been progressively breaching since 2019.
"The new US administration's refusal to return to the deal is a historic mistake," Khatibzadeh said, saying Tehran would continue to work with the UN nuclear watchdog despite scaling back cooperation.
Iran's foreign minister urged the International Atomic Energy Agency's (IAEA) 35-nation Board of Governors not to "create a mess" by endorse a US-led push to adopt a resolution against Tehran's decision to scale back its cooperation with the UN nuclear watchdog.
"Europeans, with the backing of the United States, have initiated a wrong path in the IAEA's board ... we believe this move will lead to a mess," Iranian media quoted Mohammad Javad Zarif as saying on Monday. "We have solutions for all scenarios."
In a position paper seen by Reuters and sent to other IAEA member states before the board's quarterly meeting this week, Tehran threatens to end a deal struck with the IAEA a week ago temporarily maintaining some monitoring of its activities.
However, diplomats said it was unclear whether the board would adopt a resolution.