By Zahra Hosseinian and Hossein Jaseb
Supreme Leader Ayatollah Ali Khamenei, the country's top authority, said the United States knew it was lying when it accused Iran of seeking to build nuclear weapons. He said the administration of U.S. President George W. Bush was behaving "like mad people".
Such arms were of no use and Tehran opposed them, Khamenei said at an event to mark the anniversary of the death in 1989 of the Islamic Republic's founder, Ayatollah Ruhollah Khomeini.
"Iran is not after nuclear weapons. It is after peacefully using nuclear energy … we will follow this path and … will reach it," he said in a speech broadcast on state television.
The refusal of Iran, the world's fourth-largest oil producer, to stop sensitive nuclear work has prompted three rounds of U.N. sanctions since 2006.
Iran, which has played down the impact of sanctions on its economy, says it only aims to generate electricity so it can export more oil and gas.
"Today no logical person or officials go after nuclear weapons. The Iranian nation opposes these kinds of weapons," said Khamenei, who succeeded Khomeini as Iran's supreme leader.
World powers have prepared an enhanced package of trade and other incentives for Iran if it suspends nuclear enrichment, something Tehran has consistently refused to do.
The U.S. State Department said on Monday it expected European Union foreign policy chief Javier Solana to submit the package to Tehran in mid-June.
"U.S. BULLYING"
Enriched uranium can be used as fuel for power plants or, if refined much further, provide material for bombs.
The U.N. nuclear watchdog last week said Iran's alleged research into nuclear warheads was a matter of serious concern and it should provide more information on its missile-related work. Iran has rejected the intelligence as baseless.
"Nuclear weapons do not bring a nation any power because it cannot be used," Khamenei told the crowd that had gathered at the shrine where Khomeini is buried near the capital Tehran.
He vowed Iran would stand up to U.S. "bullying" and he hit out at the administration of Bush, who last month said letting Iran acquire nuclear weapons would be an "unforgivable betrayal of future generations."
"The way they talk is like psychos talk. Sometimes they make threats, sometimes they give the order for terror, sometimes they ask for help because they are helpless and sometimes they make accusations," he said.
"They bang themselves (against the walls) like mad people."
The five permanent members of the U.N. Security Council — the United States, France, Britain, China and Russia — as well as Germany agreed on their updated offer last month but have yet to present it to Tehran.
Diplomats say it is similar to one in 2006 that was rejected by Iran but that it goes into more depth, particularly on civil nuclear cooperation. That offer included civil nuclear cooperation and wider trade in civil aircraft, energy, high technology and agriculture if Tehran suspended enrichment.
(Writing by Fredrik Dahl; Editing by Janet Lawrence)