"It has been decided that after the expiration of the agreement's deadline, Iran's Supreme National Security Council (will) decide about the agreement's extension at its first meeting," Vaezi said, according to the website.
Iran and the U.N. nuclear watchdog reached a three-month accord in February - which was extended on May 24 for a month - to cushion the blow of Tehran's decision to reduce its cooperation with the IAEA by ending extra monitoring measures introduced by its 2015 nuclear deal with world powers.