The United States Sunday condemned the attacks on foreign embassies in Tripoli, saying that it was another sign of the Gaddafi regime's failure to uphold its duty to the international community, dpa reported.
"We have seen reports indicating that British, Italian and US diplomatic facilities in Tripoli have been attacked," the US State Department said in a statement. "The Vienna convention requires that the Gaddafi-regime protect diplomatic missions in Tripoli."
"By failing to do so, that regime has once again breached its international responsibilities and obligations," an official said.
Britain expelled the Libyan ambassador to London over the attacks on the British embassy buildings and condemned the attacks on British and other diplomatic missions.
Opposition news website Bernieq reported that Gaddafi's followers set fire to the US embassy in Tripoli.
Earlier Sunday, influential Republican Senator John McCain said it would be "fine" if Libyan leader Moamer Gaddafi were to be killed or wounded in a NATO airstrike.
On the "Face the Nation" talk show on the CBS network, McCain was commenting on the NATO strike in Tripoli which killed a son and three grandsons of the Libyan leader late Saturday.
"We should be taking out his command and control, and if he is killed or injured because of that, that's fine," McCain, who is the top Republican on the US Senate Armed Services Committee, said.
The overall strategy must be to help the rebels win the conflict, he added. "We ought to have a strategy to help the rebels succeed and overthrow Gadhafi and everybody associated with him."
McCain, a veteran of the Vietnam War and the Republican Party's losing candidate in the 2008 presidential election, criticised President Barack Obama's actions so far in the Libyan conflict, saying the US had "taken a backseat role."
He said the US should provide more air power to the NATO mission.