A top Israeli official has said that if Iran continues with its alleged nuclear arms programme, Israel will attack it.
Speaking to Yediot Ahronot newspaper, Deputy Prime Minister Shaul Mofaz said sanctions on Iran were ineffective.
"The international community has a duty and responsibility to clarify to Iran, through drastic measures, that the repercussions of their continued pursuit of nuclear weapons will be devastating," Mr Olmert said.
Iran insists that its nuclear programme is for peaceful purposes but it is defying a demand from the UN Security Council to stop the enrichment of uranium.
"If Iran continues with its programme for developing nuclear weapons, we will attack it. The sanctions are ineffective," Mr Mofaz told Yediot Ahronot.
"Attacking Iran, in order to stop its nuclear plans, will be unavoidable," he said.