Senior envoys from Iran and six world powers  met for a new round of negotiations on Tuesday, in an effort to reach a broad agreement on scaling back Iran’s nuclear programme  and lifting sanctions by July.
European Union foreign policy chief Catherine Ashton and Iranian Foreign Minister Mohammad Javad Zarif convened envoys from China, France, Germany, Russia, the UK and US. The sides are seeking a permanent deal  by July 20 after breaking a decade - long deadlock with a temporary accord struck in Geneva last year.
“We’re involved in very detailed and substantial negotiations,” Ashton’s spokesman, Michael Mann, said.
Both sides in the talks have said they want to start drafting the agreement next month.
However, Iran and the six powers have yet to agree on the limits that Tehran will have to accept on its enrichment programme, and on the future of the plutonium-producing Arak reactor, Iranian and Western diplomats have said.