FBI director Robert S. Mueller III today disclosed that the FBI is investigating leaks to the news media about the recently disrupted plot by Al Qaeda's Yemen affiliate to smuggle a bomb designed to be concealed in underwear onto a U.S. bound jet. The plans for the attack, which featured a more sophisticated version of the device the underwear bomber" of Christmas 2009 was arrested with, were first revealed by the AP. But a day later, it was revealed that the individual at the center of the plot was a double agent working for Britain's MI-6 secret intelligence service and the CIA along with Saudi Arabian intelligence assets. "We have initiated an investigation into this leak," Mueller testified before the Senate Judiciary Committee on Wednesday. Justice Department officials and an FBI spokesman declined to comment on the nature of the investigation. The CIA also declined comment. Matthew Olsen, director of the National Counterterrorism Center, addressed the issue of media leaks relating to the plot and called it "devastating."