After the meeting of the European foreign ministers, European Union's foreign chief Federica Mogherini said she believes the nuclear deal with Iran is "still alive".
Iran's uranium enrichment level has passed 4.5 percent, exceeding the cap set by the 2015 nuclear deal.
As Iran exceeds the enriched uranium stockpile limit put in place by the 2015 nuclear deal, experts argue the Islamic Republic is more focused on ending crushing US-imposed sanctions than building a nuclear bomb.
Iran has exceeded the upper limit of its low-enriched uranium reserves for the first time after the US withdrew from the accord last year. The UN's atomic watchdog also confirmed the breach in a report.
Last week, Iran notified China, France, Germany, Russia and the UK of its decision to halt some commitments under the 2015 nuclear deal, a year after the US unilaterally withdrew from the accord and re-imposed sanctions.
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