LEON HARRIS, CNN ANCHOR: The Cole investigation is in full swing. Evidence is surfacing that may change initial impressions about just what happened. CNN's Carl Rochelle joins us this morning from the Pentagon. He's got this morning's developments for us -- Carl.</s>CARL ROCHELLE, CNN CORRESPONDENT: Good morning, Leon. Well, Yemeni authorities have detained and are questioning a number of members of militant groups in their investigation into the Cole. Meanwhile, U.S. officials tell CNN that bomb-making materials were found in an apartment in Yemen and that is being looked into, that is being investigated. The first materials from the residue from the bomb damage have been collected from the Cole and are on their way back, some already in the FBI labs in Washington being analyzed. Investigators will be trying to determine what kind of explosive was used in hopes that the kind of information will lead them to the source of the explosives. The U.S. Ambassador to Yemen says cooperation from Yemen is excellent.</s>BARBARA BODINE, U.S. AMBASSADOR TO YEMEN: We have already received some information from the Yemenis that provides some significant leads. We have established what we think is a highly cooperative relationship with the Yemenis. And from that we are very hopeful that we are going to be able to be able to get to the bottom of this. So I think throughout this investigation we are going to be making significant progress day to day.</s>ROCHELLE: In Washington, FBI Director Louis Freeh says cooperation from Yemen is good. Freeh plans to head for the area, expected to arrive in Yemen tomorrow to help with the investigation as it goes forward. Meanwhile, efforts to retrieve the bodies of those six sailors still missing continue. We are told that engineers are working, divers are working 12 to 14 hours a day in an effort to free those remains from the wreckage there. Pentagon sources say the Pentagon will report a senior retired military officer very soon to look into the situation surrounding the bombing, that will investigate whether security in the area was tight enough and whether anything could have been done to have prevented the bomb hitting outside Yemen. Carl Rochelle, CNN, reporting live from the Pentagon.</s>HARRIS: Thank you, Carl.
USS Cole Attack: Investigators Uncover Bomb-Making Materials in Yemen Apartment