TEHRAN (AFP) - Iran's President Mahmoud Ahmadinejad on Wednesday reaffirmed his doubts about the accepted version of the September 11, 2001 attacks on the United States, describing the strikes as a "suspect event". "Four or five years ago a suspect event took place in New York," Ahmadinejad said in a speech to a public rally in the holy city of Qom broadcast live on state television."A building collapsed and they said that 3,000 people had been killed, whose names were never published." "Under this pretext they (the United States) attacked Afghanistan and Iraq and since then a million people have been killed," he said. The speech in Qom, which was the first time he had described the September 11 attacks as "suspect," took place at the shrine of Massoumeh, the sister of Imam Reza. Ahmadinejad did not say who he believed was behind the September 11 attacks. The Iranian President also reaffirmed his determination to change the international order. "We have two missions," Ahmadinejad proclaimed. "To construct Iran and change the global situation. It is impossible to reach the summits of progress without changing the corrupt and unjust order of the world." He launched a furious new attack on his domestic rivals, vowing to "cut their hands" to break networks of economic and political corruption. "These powerful networks have infiltrated decision making and legislative bodies and execute their will," he said. "It is a time-consuming job; we should cut these hands, change the law but there is strong resistance. "I will go to the end to change and uproot all these corrupt people or who show a lack of determination. I fear nothing." Ahmadinejad's attacks appeared to be targeted at the allies of his rival, former president Akbar Hashemi Rafsanjani, who have lashed out at the president over his confrontational nuclear stance and expansionary economic policies. The president also made an extraordinary attack against one unnamed opponent, who he described as "a gentleman who still today had a important post at the centre of power." Ahmadinejad said this person was controlling network of legal and illegal imports of cigarettes to the Islamic republic, a trade worth hundreds of millions of dollars annually. The President repeated accusations that his opponents were seeking to topple the government and were siding with Iran's Western enemies. Meanwhile, the US said it was "speechless" after Ahmadinejad comment. "I am not sure what you say about a statement like that. It leaves one speechless," said State Department spokesman Sean McCormack. "It is just misguided, misinformed rhetoric," McCormack said. "I cannot tell whether or not it is something that he truly believes or if this is just an attempt to try to shake up public opinion in Iran or elsewhere," McCormack said.