NAIROBI, Kenya (AP) _ When a terrorist bomb ripped through the U.S. Embassy in Nairobi last August, Kenyan police were overwhelmed by the task of tracking down those responsible for the blast that killed 213 people and injured 5,400.

On Friday, the last group of a total of 182 Kenyan officers completed a training course in criminal investigation conducted by the FBI, whose agents poured into Kenya's capital and in less than a month managed to uncover the network that allegedly carried out the bombing.

``This program and others in the pipeline are a response to professional needs which were noted during last year's bomb blast,'' Police Commissioner Philemon Abong'o said at a ceremony marking the end of training.

Kenyan authorities were criticized for not securing the bomb site and allowing members of the public, including looters, to scramble across the rubble.

The FBI was involved in the investigation of the bombing because 12 American citizens were among the victims.

Four FBI agents, an assistant district attorney and a detective from New York Police Department conducted the last of four weeklong sessions, said Special Agent William J. Corbett, who is stationed at the U.S. Embassy in Nairobi.

No further details were given on the course.

Corbett did say that since the bombing, FBI agents and Kenyan police have shared evidence, premises and vehicles.

The United States has indicted Osama bin Laden, a Saudi exile living in Afghanistan, for setting up a terrorist group to attack U.S. nationals and interests, and for masterminding the Aug. 7 bombing in Nairobi and a nearly simultaneous attack on the U.S. Embassy in Dar es Salaam, Tanzania, in which 11 people died.

Four people have been indicted for direct involvement in the Nairobi bombing, and two others have been indicted for the attack in Tanzania.

Two of the four allegedly involved in the Kenyan bombing were apprehended in Nairobi and sent to the United States. A third man was arrested in the United States and the fourth is at large.

The two men charged in the Tanzanian bombing are in custody in Dar es Salaam.