Iran's Foreign Ministry spokesman Ramin Mehmanparast Tuesday called for 'independent' study of the number of U.S. nuclear warheads, the local ISNA news agency reported. Referring to the U.S. disclosure of the number of its nuclear arsenals at the Nuclear Non-Proliferation Treaty (NPT) Review Conference in New York, Mehmanparast said 'do American officials let independent teams study the statistics as there is no proof on their claim?' said the report. On Monday, U.S. Secretary of State Hillary Clinton said the departments of defense and energy were releasing the long-secret number of nuclear weapons in the U.S. arsenal and the number dismantled since 1991. As promised, the Defense Department later said it had 5,113 nuclear warheads in the arsenal. Speaking in his weekly briefing on Tuesday, Mehmanparast also denounced Hillary Clinton's remarks against Iran at the NPT Review Conference as 'irrational,' the local satellite Press TV reported. 'The points made by Clinton were not based on logic and global realities,' he was quoted as saying. Clinton said Monday that 'the vast majority of states are living up to their nonproliferation obligations. But a few outliers have demonstrated a determination to violate the rules and defy the international community.' 'Another has cynically claimed to be abiding by the treaty while violating its safeguards, expanding its enrichment program, failing to cooperate with the IAEA and ignoring the injunctions of the Security Council,' she added, first referring to the Democratic People's Republic of Korea and then to Iran. 