Qatar emir visits Iran as nuclear talks falter
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The one-day visit by the emir, Sheikh Tamim bin Hamad Al-Thani, came as the European Union's coordinator for the nuclear talks, Enrique Mora, held a second day of meetings in Tehran with Iran's chief negotiator Ali Bagheri.
Qatar, a close US ally, has added the Iran nuclear dispute to the list of diplomatic hotspots where it has sought to play a behind-the-scenes mediating role, and the emir has called for more dialogue to settle the standoff.
Washington unilaterally abandoned the nuclear deal under then-president Donald Trump in 2018 and reimposed sweeping economic sanctions, prompting Iran to begin rolling back its own commitments.
President Joe Biden has said he wants the United States to return to the agreement but on-off talks on the mechanics have been stalled since March.
Iran's state news agency IRNA said "unfreezing Iran's assets, cooperation in holding the 2022 World Cup, pursuing prisoner exchanges and cooperation in the field of energy" were also on the agenda of the emir's visit.
It is waiving visa fees for visitors in the hope of attracting fans to the island.