IAEA head Yukiya Amano says Iran has not broken any promises and is playing by the rules set out in a nuclear accord signed with six world powers. (Reuters Photo)

TEHRAN, Sept. 11 (Xinhua) -- The UN nuclear watchdog said Monday Iran was playing by the rules set out in a nuclear accord it signed with six world powers, Iran's local media reported.

Yukiya Amano, the head of the International Atomic Energy Agency (IAEA), said Iran had not broken any promises and was not receiving special treatment.

"The nuclear-related commitments undertaken by Iran under the (deal) are being implemented," he said in the text of a speech to a quarterly meeting of the IAEA's 35-member Board of Governors.

Most sanctions on Iran were lifted 18 months ago under the deal and, despite overstepping a limit on its stocks of one chemical, it has adhered to the key limitations imposed on it.

In April, Trump ordered a review of whether a suspension of sanctions on Iran related to the nuclear deal, negotiated under President Barack Obama, was in the U.S. national security interest. He has called it "the worst deal ever negotiated."

Iran dismissed the U.S. demand as "merely a dream."