Tehran says the next round of its nuclear talks with world powers is to begin on January 18 in Geneva.
The official news agency IRNA quoted Tehran's chief negotiator, Abbas Araqchi, as saying on January 6 that the talks would be held at the deputy-foreign-ministerial level.
He added that the Iranian negotiating team would hold bilateral discussions with the U.S. and Russian delegations on January 15.
The talks between Iran and the so-called P5+1 group -- the United States, Russia, China, Britain, France, and Germany -- aim at regulating Tehran's nuclear program in exchange for an easing of international sanctions.
The sides aim at achieving a political agreement by March and a comprehensive settlement by the end of June.
Iran denies allegations that it is seeking to build nuclear weapons.