A senior Iranian nuclear negotiator said Iran and world powers have made "good progress" in talks on how to implement an agreement regarding the country's nuclear program.
Deputy Foreign Minister Abbas Araqchi said Tuesday that "some issues remain" after experts from both sides met in Geneva.
He told state media that those issues will be the focus of a likely meeting next week with the European Union's deputy foreign policy chief, Helga Schmid.
Iran signed a six-month agreement in November with the five permanent members of the United Nations Security Council and Germany to curb its nuclear activity in exchange for some sanctions relief.
Within a year, the two sides want to reach a long-term deal to ensure Iran is not developing nuclear weapons, with the international community lifting all of the sanctions levied against the country.
Iran has insisted its nuclear program is solely for peaceful purposes.
Some information for this report was provided by AFP and Reuters.