President Bush has not ruled out the use of military force against Syria.
Mr Bush said he hoped Syria would co-operate with the UN investigation into the killing of former Lebanese prime minister Rafik al-Hariri and said military action by Washington was a last resort.
I am hoping that they will co-operate.
President George W Bush
President George W Bush
"A military (option) is always the last choice of a president," he told Al Arabiyatelevision in an interview aired on Tuesday when asked about a UN investigation report that implicated Syrian officials in Mr Hariri's murder.
"I am hoping that they will co-operate. It (military) is the last, very last option . . . But on the other hand, you know . . . I've worked hard for diplomacy and will continue to work the diplomatic angle on this issue."