The United States has accused Syria of failing to cooperate fully with a UN inquiry into the murder of former Lebanese Prime Minister Rafik al-Hariri.
The accusation, by US Ambassador to the United Nations John Bolton, came despite the latest progress report on the inquiry, which described Syrian cooperation as "generally satisfactory."
A giant poster of slain former Lebanese Prime Minister Rafik al-Hariri hangs on a building in the Lebanese capital Beirut
The inquiry is being headed by Serge Brammertz of Belgium.
"It is very clear that Mr Brammertz does not say in the report that Syria is fully cooperating," Mr Bolton told reporters after Mr Brammertz briefed the Security Council on the UN investigative commission's work. Earlier reports had accused Syria of obstructing the investigation into Hariri's 2005 assassination.
Mr Brammertz's report, sent to the council on Saturday, said Damascus "responded to all the commission's requests in a timely manner and in some instances comprehensive responses were provided."
"That is hardly a ringing endorsement," Mr Bolton said.
Comprehensive responses in only some instances "obviously implies that in some other instances - maybe a majority of instances - comprehensive responses were not provided."
Detlev Mehlis, the German who led the commission until January, had made clear in his reports his view that senior Syrian intelligence officials and their Lebanese allies were probably behind Hariri assassination on February 14th, 2005,.
Hariri and 18 others died in a massive bomb as his motorcade traveled down a Beirut street.
Mr Mehlis, who suggested Syria's leaders may have had Hariri killed for challenging Syria's domination of Lebanon, had repeatedly complained about Syrian obstruction of his work.
Syria has repeatedly denied any role in the killing and insisted it was fully cooperating.