Two girls wept at their mother's grave Saturday, while investigators labored to identify the bombers who killed her and 256 others in attacks on U.S. embassies in Kenya and Tanzania.

"We shall miss our dear mother greatly," Grace Christine Wakanyi, 12, and Maryanne Wambui, 10, said in unison during the funeral beneath a eucalyptus tree, one of dozens of funerals Saturday for Kenyan victims. Many in the crowd of hundreds sobbed. Some wore bandages on their own bombing wounds.The FBI says it will take at least another month to finish examining the scenes of the Aug. 7 bombings at two embassies in East Africa.

"The investigation is like a jigsaw puzzle of 10,000 pieces," said Kenneth Piernick, head of the FBI investigation in the Tanzanian capital of Dar es Salaam. "We have some pieces, but still 9,990 pieces remain."

In Washington, officials said Saturday that U.S. investigators were heading to Pakistan to join the investigation of a man who reportedly has confessed to planning the bombings.

Pakistani newspapers, citing unidentified government sources, said 32-year-old Mohammed Sadique was detained at the airport in Karachi, Pakistan, after flying back from Nairobi the day of the bombings. Held because he did not match the photograph in his passport, he reportedly confessed under interrogation to a role in the bombings.

Just two of 14 foreigners arrested in connection with the Tanzania bombing were still being interrogated, police said. Neither was believed to have carried out the attack, but they may be able to assist investigators, said Rajabi Adabi, director of criminal investigations.

Five people remained in custody in connection with the Kenya bombing, according to police.

In Nairobi, Kenyan soldiers and U.S. Marines stood guard Saturday around the bomb site, ringed by barbed wire. FBI specialists studied evidence in striped tents out front and at a parking lot across the street. A bulldozer piled a mound of picked-over wreckage higher.

A TV cameraman allowed into the devastated embassy recorded hints of the terror that those inside experienced immediately after the blast.

Bloody handprints were smeared on the wall of a second-floor hallway, presumably those of a survivor trying to stagger to safety. An investigator had written "BLOOD" on the wall and drawn arrows pointing to the crimson stains.

A jumble of beams, plaster, glass and other debris filled hallways and offices. While rooms on the embassy's western side - facing the bomb site - were caved in, others elsewhere were more intact. A photograph of President Clinton hung squarely on one wall.

Funerals were held Saturday across Kenya, which recorded 247 bombing deaths. In keeping with tradition, most of the dead were buried in their villages. Coffins were loaded in pickups or tied atop buses for the final journey home.