Talks have resumed in Switzerland ahead of Tuesday’s deadline for a preliminary nuclear deal with Iran.
Foreign ministers from six world powers are meeting their Iranian counterpart, amid hopes of a breakthrough after almost 18 months of negotiations.
They want to impose limits that would prevent Iran from producing enough fuel for a nuclear weapon within a year.
Iran, which insists its nuclear programme is peaceful, wants to see crippling sanctions lifted in return.
Iranian and Western officials have said that a deal is possible, but that some issues are still to be resolved.
What do they want?
- The United States, Britain, France, Germany, Russia and China want a suspension of Iran’s most sensitive nuclear work for more than 10 years
- Iranian negotiator Hamid Baidinejad has said “15 years is out of the question” but “10 years is being discussed”
- Iran had originally insisted on keeping nearly 10,000 centrifuges in operation
- In November, Washington indicated it could accept around 6,000
- Iranian officials say they have been pushing for 6,500-7,000