Vice President Dick Cheney's former top aide told prosecutors President Bush authorized the leak of sensitive intelligence information about Iraq, according to court papers filed by prosecutors in the CIA leak case.

Before his indictment, I. Lewis Libby testified to the grand jury investigating the CIA leak that Cheney told him to pass on information and that it was Bush who authorized the disclosure, the court papers say. According to the documents, the authorization led to the July 8, 2003, conversation between Libby and New York Times reporter Judith Miller.

There was no indication in the filing that either Bush or Cheney authorized Libby to disclose Valerie Plame's CIA identity.

But the disclosure in documents filed Wednesday means that the president and the vice president put Libby in play as a secret provider of information to reporters about prewar intelligence on Iraq.

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Libby's testimony also puts the president and the vice president in the awkward position of authorizing leaks - a practice both men have long said they abhor, so much so that the administration has put in motion criminal investigations to hunt down leakers.

The most recent instance is the administration's launching of a probe into who disclosed to The New York Times the existence of the warrantless domestic surveillance program authorized by Bush shortly after the Sept. 11 attacks.

If there's a leak out of my administration, I want to know who it is...If the person has violated law, that person will be taken care of. I welcome the investigation. I am absolutely confident the Justice Department will do a good job. I want to know the truth...Leaks of classified information are bad things.