The UN nuclear watchdog said Monday it regretted that "no progress" had been made by Iran on outstanding issues, including installing more cameras to monitor Tehran's nuclear programme.
International Atomic Energy Agency (IAEA) director general Rafael Grossi "requests Iran to work with the agency in earnest and in a sustained way towards the fulfilment of the commitments," the agency said in a confidential report seen by French news AFP.
Tehran in March vowed to reactivate surveillance devices which were disconnected in June 2022 amid deteriorating relations with the West.
In a separate report, also seen by AFP, the IAEA said Iran's total stockpile of enrichedws uranium was lower than in May but still more than 18 times the limit set in a 2015 accord between Tehran and world powers, the Joint Comprehensive Plan of Action (JCPoA)
Iran's total enriched uranium stockpile was estimated at 3,795.5 kilogrammes as of 19 August, down by 949 kilogrammes from May, the agency said.
The limit in the 2015 deal was set at 202.8 kilogrammes.
The stockpile of uranium enriched up to 60 percent is now at 121.6 kilos, up from 114.1 kilos in May.
Iran also has 535.8 kilos of uranium enriched up to 20 percent, up from 470.9 kilos in the last May report.
Attempts to bring Washington back into the deal and scale back Tehran's programme again have been fruitless so far with European-led talks on hold since 2022.
But the delicate agreement does not include the possibility of a return to the nuclear deal in the run-up to the 2024 US presidential election.