They say Iran must abandon uranium enrichment, but this is one of our red lines. If talks are conditional on halting enrichment, they simply won’t happen," said Ali Velayati, senior adviser to Supreme

If the negotiations must be conditioned on stopping enrichment, such negotiations will not take place,' said an advisor to Iran's supreme leader on Monday. Israel and Western nations accuse Iran of pursuing nuclear weapons,

Araghchi and Witkoff met starting in April, without concluding a deal after five rounds of talks that were the highest-level contact between their two countries since Washington in 2018 abandoned a landmark nuclear agreement.