Libya's Deputy Foreign Minister Khaled Kaim Sunday said the government regretted the attacks by regime supporters on foreign embassies in Tripoli, dpa reported.
According to CNN International, the official said crowds angry over Saturday's NATO attacks on Tripoli had overwhelmed police. The Libyan government has said the NATO attack killed a son and three grandchildren of Libyan leader Moaemer Gaddafi.
There were reports that the British embassy, evacuated due to the conflict in Libya, had been destroyed and the US embassy had been set on fire.
Britain expelled the Libyan ambassador from London as a "persona non grata" with a 24-hour grace period, British Foreign Minister William Hague said Sunday.
The United States condemned the attacks on the foreign embassies, saying the Gaddafi regime had "once again breached its international responsibilities and obligations."
Also on Sunday, the United Nations said it pulled its staff out of Tripoli because of the unrest.