Iran will file a formal complaint with the UN against the United States after President Barack Obama excepted Iran from a pledge not to use nuclear weapons against countries that do not have them, the Foreign Ministry said Sunday. Foreign Ministry spokesman Ramin Mehmanparast said Obama's implicit threat to use nuclear weapons against Iran was a “threat to global peace and security,” according to the semiofficial Fars news agency. Earlier Sunday, some 222 lawmakers of Iran's 290-seat parliament called on the Iranian government to file the complaint. Iran's Supreme Leader Ayatollah Ali Khamenei, who has the final say on all state matters, also said Obama's threatening language is proof that the US cannot be trusted. Obama announced America's new nuclear strategy Tuesday, including a vow not to use nuclear weapons against countries that do not have them. Iran, however, was pointedly excepted from that pledge, along with North Korea, because Washington accuses them of not cooperating with the international community on nonproliferation standards. Obama's new nuclear strategy turns the US focus away from the Cold War threats and instead aims to stop the spread of atomic weapons to rogue states or terrorists.