Attorney-General Robert McClelland says police are investigating whether any Australian law has been broken by the latest leaking of confidential documents by online whistle-blower WikiLeaks.

McClelland told reporters on Monday he was not aware of a request from the United States to cancel WikiLeaks founder Julian Assange's Australian passport. He says a range of options are under consideration by Australian government agencies in response to the latest disclosure of classified U.S. material.

McClelland says there are "potentially a number of criminal laws" that could have been breached.

Australian Prime Minister Julia Gillard last week condemned the planned leaks as reckless and potentially harmful to national security interests.