Shortly before the two sides are due to hold talks aimed at resolving a standoff over the origin of uranium particles found at old but undeclared sites in Iran, dismissed the UN nuclear watchdog’s work as “unprofessional” and “unfair”.
The issue is a thorn in the side of both Tehran and the International Atomic Energy Agency (IAEA) since the particles suggest Iran once had undeclared nuclear material at three different locations, but the IAEA has yet to obtain satisfactory answers from Iran on how the material got there or where it went.

“The statement of the Agency in its report is completely unprofessional, illusory and unfair,” Iran’s ambassador to the IAEA, Kazem Gharibabadi, said in a statement to a meeting of the IAEA’s 35-nation Board of Governors.
Gharibabadi was referring to a passage in an IAEA report last week that said the lack of progress was seriously affecting the IAEA’s ability to determine that Iran’s program is entirely peaceful, as Tehran says it is.
Failure to resolve the issue complicates efforts to restart talks aimed at bringing the US and Iran fully back into the fold of the 2015 nuclear deal, since Washington and its allies continue to pressure Iran to give the IAEA answers.