Julian Assange, the Australian founder of the whistleblower website Wikileaks, says he had his passport taken away from him at Melbourne Airport and was later told by customs officials that it was about to be cancelled.

Last year Wikileaks published a confidential Australian blacklist of websites to be banned under the government's proposed internet filter.

Australian-born Julian Assange

The Age has been told that Assange's passport is classified ''normal'' on the immigration database, meaning the Wikileaks director can travel freely on it.

Assange told The Age his passport was taken from him by customs officials at Melbourne Airport when he entered the country last week after he was told ''it was looking worn''.