This week’s talks were attended also by Head of Iran's Atomic Energy Organization Ali Akbar Salehi, US Secretary of Energy Ernest Moniz, Iranian Deputies Foreign Minister Seyed Abbas Araqchi and Majid Takht-e-Ravanchi, US Undersecretary of State Wendy Sherman and Deputy of EU foreign policy chief Helga Schmidt and President Hassan Rouhani's special advisor Hossein Fereydoun.
The two countries’ nuclear chiefs, Salehi and Moniz held a technical meeting, which last for one and half hours.
On Wednesday evening at 19 o'clock Montreux time, deputies foreign minister of Iran and 3 European countries of Germany, France and Britain will hold a meeting.
Then on Thursday, a plenary meeting will be held with other deputies foreign minister of the other members of Group 5+1 in Montreux.
The sides are attempting to reach a political understanding by end of March and a nuclear deal by July 1.