JERUSALEM (Reuters) - The United States and Israel agree on the need for "tangible action" to prevent Iran from developing nuclear weapons, Israeli Prime Minister Ehud Olmert's spokesman said after a visit by U.S. President George W. Bush.

"We are on the same page. We both see the threat ... And we both understand that tangible action is required to prevent the Iranians from moving forward on a nuclear weapon," Olmert spokesman Mark Regev said on Friday.

Regev described diplomatic efforts so far to exert pressure on Iran as "positive", but added: "It is clearly not sufficient and it's clear that additional steps will have to be taken".