Foreign Minister Mohammad Javad Zarif said on Monday that there is a long way ahead before clinching the final deal but the two sides made progress in certain areas of the negotiations.
Speaking to reporters after his meeting with US Secretary of State John Kerry, he said that the two sides had very serious, useful and constructive talks.
The two sides made headway in some issues but there is still a long way ahead before clinching the final deal, he said.
He said that the negotiations will proceed until a final deal to be struck.
Representatives of Iran and P5+1 agreed to proceed with talks next Monday.
Zarif thanked the active and useful presence of Head of the Atomic Energy Organization of Iran Ali Akbar Salehi in the meeting.
