"Iran has conducted its enrichment activities in line with its long-term enrichment and R&D enrichment plan" agreed with world powers, according to the six-page confidential document, seen by several news agencies, including Iran's IRNA.
International Atomic Energy Agency report shows Iran is adhering to the limits set out by the nuclear deal, as U.S. president Trump threatens to undo the agreement.
"There appears to be little other way to explain Ambassador Nikki Haley's efforts to stir up controversy in the media over IAEA inspections of non-nuclear military sites in Iran", the NIAC statement said.
Iran remains in compliance with the 2015 nuclear deal, a United Nations atomic watchdog report showed Thursday, even as growing tensions between Tehran and Washington threaten to torpedo the landmark agreement.
"Iran's military sites are off limits", Iranian government spokesman Mohammad Baqer Nobakht said.
Iran has vehemently rejected Trump's claims, and preserving the nuclear deal was one of Iranian President Hassan Rouhani's primary platforms prior to his re-election in May.More news: Yankees, Tigers Involved in Brawl; Miguel Cabrera, Austin Romine Ejected
US President Donald Trump has called the JCPOA - which was negotiated under his predecessor, Barack Obama - "the worst deal ever" and repeatedly threatened to tear it up. Trump told The Wall Street Journal in July that he "did not expect" to declare Iran compliant in the coming months, despite a lack of public evidence of any Iranian violations.
IAEA officials said they would not help the Trump administration make a false case for abandoning the agreement.
"We have to be able to vet this information", a second IAEA official said, asking not to be identified because inspections are sensitive and the agency rarely discusses them publicly.
"Haley was correct in saying that 'the IAEA is permitted to seek access to any location in Iran, including military-affiliated sites, where the IAEA has questions about possible nuclear-related activities, '" Mark Fitzpatrick, a nuclear expert with the International Institute for Strategic Studies, told Al-Monitor.
Iran has reiterated commitment to the terms of the deal despite Trump's stance, but has also said its military sites are off limits, raising the risk of a stand-off if a request for access were put to a vote. The deal saw Iran cap its nuclear activities in return for lifting of crippling sanctions.
They've produced eight reports since January 2016 showing that Iran is in broad compliance with the accord, called the JCPOA.
A USA pullout could effectively kill the agreement, and lead Iran to quickly ramp up programs that could be used to make weapons.