Iranian Foreign Minister Mohammad Javad Zarif on Thursday said that progress has been made in the nuclear talks with the six world powers in Lausanne, but added that gaps still remain.
"We have made significant progress in the talks but still we have not agreed on the reviewed solutions," Zarif told reporters at a briefing in the Swiss city.
Zarif said that if everything "goes smoothly," he and European Union foreign policy chief Federica Mogherini would give a joint statement later Thursday.
Also on Thursday, Zarif met with U.S. Secretary of State John Kerry for talks.
The foreign ministers of the six world powers – United States, Britain, France, Russia, China and Germany – convened at noon Thursday for a coordination meeting, without their Iranian counterpart. The meeting took place four hours after intense all-night negotiations with Iran ended, without breakthrough.
The negotiating teams of Iran and the six powers are scheduled to renew their talks later on Thursday.
U.S. Secretary of State John Kerry, Zarif and the European Union diplomat Helga Schmidt held deliberations for nine hours overnight in an effort to brige the gaps in the impasse over Iran's nuclear program.
“We continue to make progress but have not reached a political understanding," U.S. State Department acting Spokeswoman Marie Harf said on Wednesday.