A UN inquiry into the killing of former Lebanese Prime Minister Rafik Hariri has found new evidence that he was probably killed by a suicide bomber.
Mr Hariri was killed in a massive blast in February 2005
Its latest report says investigators believe a man who died in the February 2005 blast is likely to have detonated a truck bomb which killed Mr Hariri.
The report says new leads as to who was behind the attack in Beirut have been uncovered, but it does not elaborate.
Syria has denied involvement in the blast, in which 23 people died.
The report was delivered to UN Secretary General Kofi Annan on Monday by the inquiry's chief investigator, Belgian Serge Brammertz.
It reinforces earlier suggestions that Mr Hariri was assassinated by a large truck bomb.
Investigators believe the man detonated about 1,800kg (3,960lb) of explosives from either inside or directly in front of the truck.
The document says a tooth found at the scene and believed to belong to the bomber had a distinctive crown, suggesting the attacker came from abroad, according to the Associated Press news agency.
It says investigators found 32 pieces of what are believed to be the bomber's remains, putting him between 20 and 25 years old.
A previous leader of the inquiry, Detlev Mehlis, accused Syria of obstructing the investigation.
The latest report says Syria's co-operation with the inquiry has been "generally satisfactory".
However US ambassador to the UN John Bolton said the latest report did not mean Syria was in the clear.
Mr Hariri's death triggered huge demonstrations in Lebanon against the Syrians.
Damascus denied involvement but eventually bowed to international pressure, pulling out its troops after nearly 30 years of military presence.
The UN Security Council is due to meet on Friday to discuss Mr Brammertz's latest findings.