"They should explain why they attacked us in the middle of... negotiations, and they have to ensure that they are not going to repeat that," Araghchi said in an interview published on Thursday.
The official added that the US must take responsibility for striking Iran during ongoing diplomatic exchanges and that talks cannot resume without financial redress.
Iran confirms new enrichment plant near Isfahan was hit
A third enrichment facility near Isfahan was struck during last month’s conflict, Araghchi told FT, marking the first time Tehran has publicly acknowledged the site was targeted.
Araghchi said the plant had been prepared for activation in response to a formal censure by the International Atomic Energy Agency’s board of governors, which criticized Iran’s lack of cooperation.
“As far as I know, the preparations were made, but it was not active when it was attacked,” he said.
The site was hit as part of a broader US operation that, two days before a ceasefire, targeted Iran’s main enrichment centers at Fordow and Natanz and struck multiple facilities in Isfahan.
‘Road to negotiation is narrow’
Araghchi said he has been in contact with US envoy Steve Witkoff and that the two sides have exchanged messages before, during and after the war. He described the path to talks as narrow but not closed.
“I need to convince my hierarchy that if we go for negotiation, the other side is coming with real determination for a win-win deal,” he said. But he added that Tehran requires confidence-building measures before proceeding, including financial compensation and security assurances.
Araghchi repeated Iran’s rejection of US demands for “zero enrichment” and said Tehran would not abandon its rights under the Nuclear Non-Proliferation Treaty. He said Iran still retains the knowledge and technical capability to resume high-level enrichment if needed.
Talks with IAEA expected next month
Though Iran suspended cooperation with the International Atomic Energy Agency after the war, Araghchi said Tehran expects to hold technical talks with the agency in the coming weeks to discuss a “new modality of cooperation.” He said the talks would not involve inspections.
Western officials say Iran’s nuclear infrastructure was heavily damaged but not eliminated, and that a significant stockpile of highly enriched uranium may remain.
Warning to Europe over snapback
Araghchi also warned the UK, France and Germany that any move to trigger the UN snapback mechanism, which would restore sanctions lifted under the 2015 nuclear deal, would end Iran’s talks with them.
“If they do snapback, that means that this is the end of the road for them,” he said. “With the Europeans, there is no reason right now to negotiate because they cannot lift sanctions, they cannot do anything.”
The US said it remains open to direct talks with Iran but reaffirmed its maximum pressure strategy this week by announcing new sanctions on an Iranian oil shipping network.