Iranian Foreign Minister Mohammad Javad Zarif and the European Union Foreign Policy Chief Federica Mogherini, who has been coordinating diplomacy with Iran on behalf of the six powers, announced prior to the plenary session that the diplomatic talks have yielded result.
Mogherini told reporters that such negotiations over Iran's nuclear program "can open the way for a new chapter in international relations" and would also "show that diplomacy, coordination, (and) cooperation can overcome decades of tensions and confrontations."
A formal joint statement is expected to be read out following the final plenary meeting.
After some 22 months of diplomatic negotiations, the negotiating parties reached a conclusion over the text of a comprehensive deal that would end more than a decade of impasse over Tehran's nuclear energy program.