Iran and six world powers enter a crucial third day of talks Friday in Geneva, where they will try to close gaps on an interim deal that would curb Tehran's nuclear program in exchange for sanctions relief.
Diplomats from both sides reported progress following Thursday's meeting, but said substantial disagreements remain. A key sticking point appears to be to what extent Iran will be allowed to enrich uranium. Another is how much the sanctions will be relaxed.
Under discussion is a first-phase agreement meant to build trust while the two sides work out a more comprehensive deal that would ease Western concerns about Iran's ability to build nuclear weapons.
Iran's Deputy Foreign Minister Abbas Araqchi said Thursday his country will not agree to suspend uranium enrichment.
Tehran denies it wants to build a nuclear weapon. It has offered to suspend parts of its nuclear program and agreed to tighter inspections if the West relaxes sanctions that have devastated its economy.