Three hours of high-profile expert-level nuclear negotiations between Iran and the United States in Geneva on Saturday will begin for the moment after a short interval, IRNA reported.
The talks are co-chaired by head of the Atomic Energy Organization of Iran Ali-Akbar Salehi and US Secretary of Energy Ernest Moniz.
Salehi's deputy Behrouz Kamalvandi, deputies of foreign minister Abbas Araqchi and Majid Takht-e Ravanchi, as well as US top negotiator Wendy Sherman are also to attend the meeting.
The two sides, are going to discuss technical issues surrounding Iran's nuclear program.
Foreign Minister Mohammad Javad Zarif and US Secretary of State John Kerry are also scheduled to arrive in Geneva on Sunday.
Joined by Helga Schmid, the deputy of EU foreign Policy chief Federica Mogherini, the nuclear talks will proceed trilaterally.
Before his arrival in Geneva, Kerry will stop in London to meet and confer with his British counterpart Philip Hammond over Iran's nuclear dispute and the crisis going on in eastern Ukraine.
On Friday, the Iranian and US deputy foreign ministers and Schmid held five hours of talks. Experts of the two countries also held a separate meeting for two-and-a-half hours.
IRNA reporter in Geneva said that deputy foreign ministers of other members of the P5+1 (the United States, Britain, France, Russia and China, plus Germany) may join the talks in coming days.
Representatives of Iran and the six governments are aiming to reach a political understanding by March and agree on a comprehensive deal by a self-imposed June 30 deadline.