As the United Nations International Atomic Energy Agency prepares to unveil its report on Iran's nuclear program, Iranian President Mahmoud Ahmadinejad said Tuesday that the Islamic republican did not need a nuclear mob to confront the United States.

If American wants to confront the Iranian nation, it will certainly regret the Iranian nation's response, Ahmadinejad was quoted as saying by the IRNA news agency. They are saying that Iran is seeking the atomic bomb. But they should know ... we do not need a bomb ... Rather we will act thoughtfully and with logic. History has shown that anyone acting against the Iranian nation regrets it.

Earlier, Iranian Foreign Minister Ali Akbar Salehi denied the U.N. atomic watchdog report would find evidence that Iran is developing nuclear weapons.

There is no serious proof that Iran is going to create a nuclear warhead, Salehi was quoted as saying by AFP during a visit to Armenia. The West and the United States are exerting pressure on Iran without serious arguments and proof. We have repeatedly states that we are not going to create nuclear weapons.

The report from the IAEA is set to be released Wednesday and is expected to include details of activities that suggest work toward developing nuclear warheads. The report also points to a former Soviet weapons scientist who allegedly tutored Iranians to overcome key technical hurdles, The Washington Post reported.

Chinese foreign ministry spokesman Hong Lei told reporters Tuesday that Tehran should show flexibility and sincerity and engage in serious cooperation with the agency while urging the IAEA to be just and objective, Fox News reported.

China is against the proliferation of nuclear weapons and opposes the development of nuclear weapons by any country in the Middle East region. It is imperative to prevent new turbulence in the Middle East security situation, Hong said.

Ahmadinejad said Monday that the U.S. and Israel feared Tehran's atomic program, but maintained that it was strictly for peaceful purposes.