UNITED NATIONS (AFP) - Iran's UN mission has complained to the Security Council over US Democratic presidential hopeful Hillary Clinton's threat to "totally obliterate" the Islamic Republic if it were to launch a nuclear attack on Israel. "The Islamic Republic of Iran expresses its deep concern over, and strong condemnation of such a provocative, unwarranted and irresponsible statement against the Iranian nation and civilization," Iran's deputy ambassador to the UN Mehdi Danesh-Yazdi said in a letter to the council released here. Top Imam Ahmad Khatami vowed that Iran would deal a knock-out blow to what he called maniacs in the US and Israel if they ever attacked the Islamic republic. The Imam said the fact that the US had not yet attacked Iran was because it "has not been possible, not that it did not want to." "Death be upon" Israel for "celebrating the killing of innocent people" in the Gaza Strip, Khatami also said. Iran does not recognise Israel, and President Mahmoud Ahmadinejad has called for the annihilation of the Jewish State. "Israel should know that these pressures will pave the way for another Intifada which will turn the Israelis' day into night," Khatami said. Khatami also took a swipe at US Democrat presidential hopeful Hillary Clinton for her threat to "totally obliterate" Iran if it launched a nuclear attack on Israel. "Shame on you that your presidents should be weak-willed servants of Israel," he said.