TEHRAN - Iran's ambassador to international organizations in Vienna, Kazem Gharibabadi, and his Russian counterpart, Mikhail Ulyanov, discussed the restart of the talks on the revival of the 2015 nuclear deal, state TV reported on Tuesday.

The two sides discussed the resumption of the Vienna talks about the deal, also known as the Joint Comprehensive Plan of Action (JCPOA), as well as the issues on the agenda of the International Atomic Energy Agency (IAEA) concerning Iran's nuclear program.

The report did not reveal further details about the meeting.

Former US president Donald Trump withdrew from the 2015 agreement in May 2018 and unilaterally re-imposed old and new sanctions on Iran. In response, Iran has gradually stopped implementing parts of its commitments to the deal since May 2019.

After six rounds of talks in Vienna since April, the parties said serious differences remain between Iran and the United States for the revitalization of the deal. The sixth round of talks ended on June 20, with the talks currently on hiatus.

On Monday, Iran's Foreign Ministry spokesman Saeed Khatibzadeh said that the United States need to fulfill its nuke commitments and "complete and effective" lifting of unilateral sanctions against Iran.