Iranian Vice President Ali Akbar Salehi is going to meet the US energy secretary, Ernest Moniz, during two days of expert-level talks between Iran and the US in Geneva, Behrouz Kamalvand, spokesman for Iran's Atomic Organisation, told IRNA.
Salehi is also chief of Iran's nuclear organisation. He will leave Tehran for Switzerland today, Kamalvand said.
Iranian Foreign Minister Javad Zarif and US Secretary of State John Kerry will also meet in Geneva on Sunday, Deputy Foreign Minister Abbas Araghchi said on Thursday.
The US and other nations negotiating with Tehran have long suspected Iran's nuclear program is secretly aimed at weapons capability. Tehran insists the program is entirely devoted to civilian purposes.
Iran and world powers are to hold a new round of nuclear talks. Tehran and the six-nation group i.E the US, Russia, China, Britain, France and Germany hope to agree on a framework by March and a final accord by June 30.