The head of the UN nuclear watchdog said on Monday Iran was playing by the rules set out in a nuclear accord it signed with six world powers in 2015.

Yukiya Amano, the head of the International Atomic Energy Agency (IAEA), said Iran had not broken any promises and was not receiving special treatment, after Washington suggested it was not adhering to the deal.

“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 it has adhered to the key limitations imposed on it.

The US ambassador to the United Nations, Nikki Haley, traveled to Vienna last month to speak with Amano about Iran and asked if the IAEA planned to inspect Iranian military sites, something she has called for.

“We will continue to implement the Additional Protocol in Iran …as we do in other countries,” Amano said.

Source: Reuters