Kate Adie: "A man was extracted from under tons of concrete"

Dozens of FBI agents are working in and around the badly-damaged embassy building in Nairobi which was sealed off by armed American marines after the attack.

Correspondent Cathy Jenkins: "The rescue has speeded the search for survivors"

More than 140 people are now known to have died and more that 4,000 were injured in the attacks on US embassies in Nairobi and Dar es Salaam which happened almost simultaneously on Friday.

Foreign help has been arriving in Kenya, including an Israeli team with sniffer dogs which is searching in the rubble of the Co-operative Bank next to the embassy.

American investigators are expected later on Sunday in Tanzania, where at least nine people died in the attack on the American embassy.

Man found alive

Rescuers pulled a 45-year-old man alive from the wreckage of the bank building in Nairobi on Saturday evening - 36 hours after the bomb blasts.

Our correspondent says there was "a surge of joy and hope" among the rescuers when the man, who had been trapped between slabs of concrete, was pulled free.

Food and medical supplies are arriving

"This is marvellous news for the rescue operation," she said.

The search teams said at least one other person was still alive in the rubble - a woman they had managed to speak to.

Earlier on Saturday, a man whose cries were heard in the wreckage of the building died after rescuers spent four hours clearing debris to find him.

More than 100 people are said still to be unaccounted for.

Security camera clue

The car park behind the Nairobi embassy, where a car bomb is believed to have exploded, was monitored by security cameras.

The US ambassador, Prudence Bushnell, who suffered minor injuries in the attack, said she did not know whether the recordings survived the blast.

An FBI official said the investigators' priority would be to determine the kind of vehicle and the type of explosive device used, which he said could be like a fingerprint of those responsible.

Some were flown to South Africa for treatment

The Kenyan President, Daniel arap Moi, has declared five days of national mourning.

The former US ambassador to Kenya, Smith Hempstone, said: "I immediately thought of the usual suspects - Libya, Syria, Iran, Iraq, the PLO.

"I'd like to think (we'll) run them down and terminate them with extreme prejudice, as they used to say in Vietnam."

Former US Ambassador to Kenya, Smith Hempstone: "The usual suspects"

Our correspondent says Nairobi's hospitals are struggling to cope with the injuries.

The US President, Bill Clinton, has again stressed Washington's determination to catch the bombers.

"No matter how long it takes or where it takes us we will pursue terrorists until the cases are solved and justice is done," he said in a radio address from the White House on Saturday.

The US Under Secretary of State, James Pickering, said there had been no specific threats before the bombs, although earlier in the week a group known as the Islamic Jihad had made unspecified threats.

There are also unconfirmed reports that one man was arrested in Nairobi in connection with the bombing.