Osama bin Laden has released a new audio tape on an Islamist website warning the US about being an ally of Israel

The message from the al-Qaeda leader was titled 'A statement to the American people.'

It accused neo-conservatives of maintaining a grip on the White House and was released two days after the US marked the eighth anniversary of the 11 September attacks on New York and Washington.

'The time has come for you to liberate yourselves from fear and the ideological terrorism of neo-conservatives and the Israeli lobby.

'The reason for our dispute with you is your support for your ally Israel, occupying our land in Palestine.'

Osama bin Laden also discussed the new US Presidency, saying there had been no real change in policy because of the retention of people like Defence Secretary Robert Gates from the administration of former President Bush.

The website had said earlier this month it would soon carry a 'present' to Muslims from bin Laden on the occasion of the holy month of Ramadan.

The authenticity is yet to be verified, but the website often is used by supporters of al-Qaeda.

Bin Laden is thought to be in hiding in the mountainous terrain along the Afghan-Pakistani border.

The tape made reference to Barack Obama's speech in Cairo in June, suggesting the message was recorded afterwards.