Iran is warning it may reconsider its cooperation with the International Atomic Energy Agency unless the United States honours the agreement it signed with Tehran and international powers in 2015.
President Donald Trump has refused to certify the deal - which lifted sanctions in return for Iran scaling back its nuclear programme.
The US Congress has a few more days left to decide whether or not to impose new sanctions.
Al Jazeera's Zein Basravi reports from Tehran.
