Mohammad Javad Zarif represented Iran in the talks while the Secretary of State Johan Kerry led the American delegation in the fourth day of talks. The session was held at Beau Rivage Palace Hotel.

Iranian nuclear agency chief Ali Akbar Salehi, Foreign Ministry deputies Abbas Araqchi and Majid Takht Ravanchi were also present in the meeting.

The American Secretary of Energy Ernest Moniz and the US Undersecretary of State Wendy Sherman were also attending the meeting.

After it Foreign Minister Mohammad Javad Zarif discussed latest developments in nuclear negotiations with his Chinese counterpart Wang Yi on Sunday in the Swiss town of Lausanne.

The two ministers reviewed the achieved solutions and remaining differences in the meeting, IRNA reports.

The Chinese foreign minister arrived in Lausanne on Sunday morning and met Zarif immediately after going to the hotel where the nuclear negotiators stay.

Russian Minister of Foreign Affairs Sergei Lavrov is to arrive in Lausanne on Sunday afternoon and to join other diplomats who are trying to reach an agreement on Iran's nuclear program.

Iran and the six world powers have been in talks to resolve outstanding issues surrounding Tehran’s nuclear program to pave the way for striking an overarching deal on the country’s nuclear program as a deadline slated for July 1 draws closer.