Rafael Grossi, head of the International Atomic Energy Agency (IAEA), said on Monday he was concerned the international community was losing interest in holding Iran to account over its advancing nuclear program, AFP reported.
Last week, the IAEA said in reports seen by AFP that Iran had made "no progress" on several outstanding nuclear issues.
These include reinstalling IAEA monitoring cameras Tehran had removed from its nuclear sites, or explaining the presence of uranium particles found in Iran.
The IAEA has long sought answers from Iran about two sites near Tehran that inspectors say bore traces of man-made uranium.
The sites have been identified as as Turquzabad and Varamin, just outside of Tehran. READ MORE