Iran's foreign minister has used a YouTube posting to say a comprehensive agreement over its nuclear programme has never been closer.
Javad Zarif said that the agreement would open new ways to address common challenges such as extremism in the Middle East.
US Secretary of State John Kerry agreed that they were "making progress" but said lots of work was still to be done.
Negotiators are racing to meet a deadline for an agreement on 7 July.
Mr Zarif called for an end to "coercion and pressure" at the nuclear talks, in the video message on Friday.
He said that Iran was ready to strike a deal and that negotiators had "never been closer to a lasting outcome".