President Bush has called on the United Nations to convene as quickly as possible to address a report implicating Syrian officials in the assassination of former Lebanese Prime Minister Rafik Hariri. Mr. Bush said Friday he found the report by U.N. investigator Detley Mehlis linking Syrian and Lebanese intelligence officials in Mr. Hariri's death "deeply disturbing." British Foreign Secretary Jack Straw says the U.N. Security Council will consider imposing international sanctions on Syria following the report. He did not elaborate further. Syria's U.N. ambassador, Fayssal Mekdad, called the report politically motivated and not credible. He called accusations Damascus was not cooperative in the investigation "baseless." The report's author will brief the U.N. Security Council next week on his findings, which are likely to further isolate Syria internationally.