Iran will hit back against any attack or even threat of military action, the country's supreme leader said Thursday after Israel warned the world must act to prevent Tehran getting nuclear weapons.

Iran "will respond with full force to any aggression or even threats in a way that will demolish the aggressors from within," Ayatollah Ali Khamenei told students at a Tehran military college, according to his official website.

Khamenei said the message was directed at Iran's enemies, "especially America and its stooges and the Zionist regime (Israel)."

The supreme leader's forceful language followed threats last week from Israel that air strikes could be in the offing against Iran's nuclear facilities.

President Shimon Peres said on Saturday that such action was becoming "more and more likely."

Rhetoric between Iran and its two principal foes, Israel and the United States, has risen since the release on Tuesday of a UN report saying there was "credible" evidence suggesting Iran's atomic programme was being used to research putting nuclear warheads in ballistic missiles.

Iran, which has long denied any military thrust to its nuclear programme, responded to the report by saying it would not budge "an iota" from its atomic course and asserted it could confront any attack.

Defence Minister Ahmad Vahid was quoted by state media as saying "the armed forces of the Islamic republic will powerfully respond to any aggression and threat... Any (action) by the usurper regime (of Israel) will spell its demise."

A day earlier, armed forces deputy chief Brigadier General Masoud Jazayeri also predicted Israel's "destruction" if it attacks and warned: "Our response would not be limited to the Middle East."

"Iran is not a nation to sit still and just observe threats from fragile materialist powers which are being eaten by worms from inside," Khamenei was quoted as telling the military cadets on Thursday.

"Anyone who harbours any thought of invading the Islamic Republic of Iran -- or even if the thought crosses their mind -- should be prepared to receive strong blows and the steel fists of the military, the (Revolutionary) Guards, and the Basij (militia), or in other words the Iranian nation," he said.

Iran's parliament speaker Ali Larijani reinforced the message, warning Western governments they "risk breaking their neck if they play certain games," the state television website reported.

Israeli Prime Minister Benjamin Netanyahu said on Wednesday "the international community must bring about the cessation of Iran's pursuit of nuclear weapons which endanger the peace of the world and of the Middle East."

Although he did not say what action Israel was looking at taking, media reports last week said he and Defence Minister Ehud Barak were seeking cabinet support for a pre-emptive Israeli attack on Iran.

Israel last week carried out what national media called a "ballistic missile" test, as well as a large-scale civil defence drill simulating the response to conventional and non-conventional missile attacks.

Following the UN report, the European Union was preparing a new round of sanctions against Iran ahead of a meeting of its foreign ministers on Monday, diplomats in Brussels said on condition of anonymity.

Russia, which built Iran's first nuclear plant at Bushehr, has already ruled out support for any more sanctions against the Islamic republic before the UN Security Council, where it holds the power of veto.

And its nuclear chief Sergei Kiriyenko said on Thursday that Moscow was ready to build more nuclear reactors in Iran.

"We are looking into it, we have the orders, so we are working this proposal through, since building specifically nuclear reactors is not an issue of doubt in the international community," Kiriyenko told a government meeting.

The United States has said it is consulting with allies on ways to put "additional pressure" on Iran.

State Department spokesman Mark Toner said "a range of options" were being considered. "I don't want to rule anything out or anything in," he said.

burs/dv