Iran is rejecting a U.S. request to allow United Nations inspectors access to its military bases, calling the proposal “merely a dream,” Reuters reports.

“Iran’s military sites are off limits. ... All information about these sites are classified,” said government spokesman Mohammad Baqer Nobakht on a weekly state television broadcast, according to the report.

“Iran will never allow such visits. Don’t pay attention to such remarks that are only a dream.”

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U.S. Ambassador to the U.N. Nikki Haley Nimrata (Nikki) Haley'The soul' versus 'law and order' Author Ryan Girdusky: RNC worked best when highlighting 'regular people' as opposed to 'standard Republicans' GOP lobbyists pleasantly surprised by Republican convention MORE last week urged the International Atomic Energy Agency to seek access to Iran’s military sites to ensure Tehran is not covering up any nuclear weapons work.

Under the nuclear deal, Iran vowed to suspend its nuclear weapons program in exchange for sanctions relief. The deal also allows the IAEA to inspect Iranian facilities if they suspect illegal nuclear activity.

"The Americans will take their dream of visiting our military and sensitive sites to their graves. ... It will never happen," a top adviser to Iranian Supreme Leader Ayatollah Ali Khamenei told Reuters.

President Trump railed against the Iran nuclear deal negotiated by former President Barack Obama Barack Hussein ObamaTwitter investigating automated image previews over apparent algorithmic bias Donald Trump delivers promise for less interventions in foreign policy Rush Limbaugh encourages Senate to skip hearings for Trump's SCOTUS nominee MORE on the campaign trail. But his administration re-certified that Iran is complying with the nuclear deal in April.

Trump, though, has also promised new sanctions outside of the agreement to hit Iran for its support of Syrian President Bashar Assad and terrorist groups.

The State Department must re-certify that Iran is compliant with the nuclear deal every 90 days, with the next deadline coming in October.