NAIROBI, Kenya (CNN) -- Kenyans throughout the country were burying the dead Sunday, while investigators hunted for new clues to last week's U.S. embassy bombings in Nairobi and the Tanzanian capital, Dar es Salaam, where police said they had released all but two suspects held for questioning.

Graves were dug in the red earth in a Nairobi cemetery and newspapers carried dozens of black-bordered death announcements for the more than 200 Kenyans killed in Nairobi alone.

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At Langata Cemetery, hundreds of mourners remembered Alice Ndutu Gachiri, a government secretary who was killed while at work on the third floor of Cooperative Bank House, which towers above a parking lot where the car bomb exploded.

Watching shovels of dirt fall onto his 36-year-old sister's coffin, Peter Njao remembered her as "our guiding light. She was someone who would keep somebody's secret, and she would really try to help."

"We have cried until we think we can shed no more tears," said a woman preacher who led a prayer ceremony at another service.

Clinton sends condolences

In a videotaped message, U.S. President Bill Clinton extended condolences to the victims' families, saying, "We grieve together."

"Violent extremists try to use bullets and bombs to derail our united efforts to bring peace to every part of this earth," he said.

"But I am proud that our nations have also renewed our commitment to stand together -- to bring the offender swiftly to justice, to combat terrorism in all its forms and to create a more tolerant and peaceful world for our children," Clinton said.

Eight days after the bombings, Kenyan newspapers reflected a mixture of grief, bewilderment and anger.

Several letters to the editor accused the Americans of giving priority to U.S. victims and protecting evidence at the bombed embassy site at the expense of rescue efforts. All but 12 of the dead were Kenyans.

U.S. Secretary of State Madeleine Albright announced she will leave Sunday for the two East African capitals to meet with investigators and console the injured.

Her four-day trip amounts to a show of support, and a declaration of U.S. resolve in the face of terrorism.

Albright

Blast has economic ripple effects

Apart from the grief and tears that came with the human loss, there was the emerging picture of severe economic damage caused by the terrorist attack.

Kenyan President Daniel arap Moi put the economic damage at more than $500 million.

Insurance companies said they would pay out death policies but not on business claims since these are usually excluded if the damage is caused by terrorist attacks.

Dozens of businesses around the embassy will likely be out of action for months as the buildings are repaired.

Apart from the costs to the businesses themselves, that will mean hundreds of people will be laid off, with ripple effects throughout the country as remittances to relatives dry up.

The tourism sector, already in deep trouble as a result of political violence ahead of last December's general election, has taken a further hit.

Kenya's Tourist Board said travel agents had recorded up to 50 percent cancellation of bookings since the bombing.

Investigators hunt for clues

U.S. FBI agents working with Kenyan police combed the blast site in Nairobi for evidence to try to identify who set off the bomb on August 7 that killed at least 257 people in Kenya and Nairobi and wounded more than 5,000.

Roads in the central business district in Nairobi were open Saturday, although the site of a flattened office building next to the U.S. Embassy was still cordoned off by razor wire and guarded by Kenyan troops.

Tanzanian police said they had freed 12 suspects but continued to question two of the 14 foreign nationals they detained after the blast at the U.S. Embassy in Dar es Salaam, which occurred within minutes of the Nairobi explosion and killed nine Tanzanians and one Kenyan.

"The two (still being held) are not the real perpetrators of the bomb," Director of Criminal Investigations Rajabu Adadi told a news conference in Dar es Salaam.

Tanzanian police said they were looking for the assistant to the driver of a water truck which arrived at the embassy gates just before the explosion and could have carried the bomb.