They discussed latest developments in case of writing the text of the Comprehensive Agreement on the 9th day of negotiations underway in Vienna on Thursday.
It is scheduled that Iranˈs deputy foreign ministers Majid Takht-e Ravanchi and Abbas Araqchi discuss the text of the Comprehensive Agreement with Helga Schmid and Stephan Klement, the EU representatives as well as the US undersecretary of State Wendy Sherman at evening.
Zarif and Ashton have led the sixth round of nuclear talks underway in Vienna since last week.
The negotiations will proceed until July 20 and the two parties are expected to reach a Comprehensive Agreement.
Iran and the Group 5+1 sealed an interim deal in the Swiss city of Geneva on November 24, 2013, to pave the way for a settlement of their decade-old dispute over the Iranian nuclear program. The deal came into force on January 20.
Under the Geneva deal, dubbed the Joint Plan of Action, the six countries undertook to provide Iran with some sanctions relief in exchange for Tehran agreeing to limit certain aspects of its nuclear program for confidence-building.