The sides reportedly agreed in principle to resume nuclear talks, though the exact time and location have not yet been decided.
The country that will host the negotiations has also not been determined, the source told Tasnim.
The talks are expected to take place at the level of deputy foreign ministers from Iran, the UK, France, and Germany.
On July 16, Axios reported that U.S. Secretary of State Marco Rubio and the foreign ministers of France, Germany, and the UK agreed during a phone call to give Iran a deadline—until the end of August—to reach a nuclear deal.
If no agreement is reached by then, the three European countries reportedly plan to trigger the “snapback” mechanism. This would automatically reinstate all United Nations Security Council sanctions lifted under the 2015 Iran nuclear deal.