The US prosecutor leading the inquiry into the leaking of the identity of a CIA agent says the case will involve fresh proceedings before a grand jury.
Patrick Fitzgerald says his inquiry into the leak is not yet over
Patrick Fitzgerald is investigating whether the White House deliberately revealed the name of Valerie Plame.
The inquiry has already led to the indictment of former vice-presidential aide Lewis Libby on perjury charges.
Mr Fitzgerald's statement that he is working with a new grand jury could mean he is planning more charges.
The term of the last grand jury expired last month.
Mr Libby quit as Dick Cheney's chief of staff after he was charged on five counts of perjury, making false statements and obstructing justice.
President George W Bush's top political adviser, Karl Rove, remains under investigation.
On Monday, veteran Washington Post reporter Bob Woodward testified that he was told that Ms Plame was a CIA agent by an administration official - apparently not Mr Rove or Mr Libby - a month before she was unmasked.
Valerie Plame is the wife of former US ambassador Joseph Wilson, who had criticised the administration in the run-up to the Iraq war.
Mr Wilson accused the Bush administration of distorting intelligence to exaggerate the threat from Saddam Hussein's regime.
Ms Plame's name was exposed by conservative columnist Robert Novak.
Mr Libby was not charged with leaking the identity of an undercover agent - which is a crime in the US - but on charges that he lied to FBI agents and a grand jury about when he learned Ms Plame's identity.
He insists he is innocent.