Iran's supreme leader Ayatollah Ali Khamenei said on Friday that Tehran wanted action and not promises from six world powers for the revival of their 2015 nuclear deal.
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"I have told our negotiators that actions, not promises, are needed for the restoration of the nuclear deal," Khamenei said in a televised speech.
Tehran and global powers have been in talks since early April aimed at bringing back Washington and Tehran into full compliance with the deal that former US President Donald Trump exited in 2018.
In reaction to the sanctions imposed by Trump following the US exit, Tehran has been rebuilding stockpiles of enriched uranium, enriching it to higher levels of fissile purity, and installing advanced centrifuges to speed up production.
While the European Union envoy coordinating the talks said on Wednesday he believed a deal would be struck at the next round starting next week, other senior diplomats have said the most difficult decisions lie ahead.
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