The inquiry focuses on disclosures to The New York Times about warrantless surveillance conducted by the National Security Agency since the Sept. 11, 2001, terror attacks on the United States, officials said.
The newspaper recently revealed the existence of the program in a front-page story that also acknowledged that the news had been withheld from publication for a year. The delay, the Times said, partly was at the request of the administration and partly because the newspaper wanted more time to confirm various aspects of the program.
White House spokesman Trent Duffy said Justice undertook the action on its own, and President Bush was informed of it Friday.
"The leaking of classified information is a serious issue. The fact is that al Qaeda's playbook is not printed on page one, and when America's is, it has serious ramifications," Duffy told reporters in Crawford, Texas, where Bush was spending the holidays.
But, as CBS News correspondent Jim Acosta reports, the investigation could be a complex one judging by the number of
First was the White House itself, where the Times reports some officials knew of doubts about the legality of the program. Then there was the NSA, which specializes in monitoring foreign communications, and may have been unhappy with its domestic assignment. The FBI and CIA leadership also knew — as did some in the Justice Department and a judge on a secret court which is supposed to oversee secret wiretaps, Acosta reports.
Disclosure of the secret spying program two weeks ago unleashed a barrage of criticism of the administration. Some critics accused the president of breaking the law by authorizing intercepts of conversations, without prior court approval or oversight, of people inside the United States and abroad who had suspected ties to al Qaeda or its affiliates.
President Bush, who acknowledged the program's existence and described how it operates, has argued that the initiative is legal in a time of war. A Times spokesperson declined to comment.
Earlier this month, the president said he would not order the Justice Department to investigate the leak - but there was no mistaking his anger that the wiretap program was disclosed, reports CBS News correspondent Mark Knoller. He called it a "shameful act" in a time of war that would help the enemy.
The inquiry launched Friday is only the most recent effort by the Bush administration to determine who is disclosing information to journalists.
Two years ago, a special counsel was named to investigate who inside the White House gave reporters the identity of CIA operative Valerie Plame, an effort that led to perjury and obstruction of justice charges against Vice President Dick Cheney's top aide, Lewis "Scooter" Libby.
More recently, the Justice Department has begun examining whether classified information was illegally disclosed to The Washington Post about a network of secret CIA prisons in Eastern Europe and elsewhere.
The NSA leak probe was launched after the Justice Department received a request from the spy agency.