Turkey on Tuesday urged Moammar Gadhafi to "immediately" cede power and leave Libya, in its first public call on the veteran strongman to go.

"We wish that the Libyan leader pulls out from Libya and cedes power immediately -- for himself and for the future of his country -- without causing more bloodshed, tears and destruction," Prime Minister Recep Tayyip Erdogan told reporters.

Britain expelled the Libyan ambassador Sunday following attacks on the British and Italian embassies in Tripoli, saying Moammar Gadhafi's regime had failed in its duty to protect diplomatic missions.

Protesters set fire to the buildings, which are on the same street in central Tripoli, early on Sunday, Agence France Presse reported, adding that the mob at the Italian embassy ripped down the Italian flag and threw it into the street.

Russia called for an immediate ceasefire in Libya Sunday and said it had "serious doubts" the West was not targeting Moammar Gadhafi and his family after Tripoli said the leader's son was killed.

"The claims of the coalition members that strikes over Libya do not have the physical destruction of Moammar Gadhafi and members of his family as their goal cause serious doubts," the foreign ministry said in a statement.

A NATO air strike killed Moammar Gadhafi's youngest son and three grandchildren but the strongman escaped unhurt, a Libyan spokesman said Sunday, after rebels and NATO spurned an offer for talks to end the crisis.

The house of Seif al-Arab Gadhafi, 29, "was attacked tonight with full power," government spokesman Moussa Ibrahim told a news conference, announcing the deaths in the Saturday evening strikes.

The Libyan opposition Transitional National Council (TNC) on Saturday rejected calls for talks by strongman Moammer Gadhafi, saying he had no role to play in the north African nation's future.

"The time for compromise has passed," said Abdul Hafiz Ghoga, vice-chairman of the transitional council that has shaped itself into a parallel government in the rebel-held eastern city of Benghazi.

The United States on Thursday raised allegations that Moammer Gadhafi's regime gives Viagra to troops to carry out rapes as the UN Security Council wrangled over coalition attacks in Libya, diplomats said.

Russia and other nations have argued that France, Britain, the United States and their allies patrolling a no-fly zone over Libya are going beyond the mandate given by U.N. Security Council resolutions.

NATO bombs wrecked Libyan leader Moammar Gadhafi's office in his immense Tripoli residence on Monday, while rebels in besieged Misrata said they had pushed loyalist forces out of the city.

Heavy explosions shook central Tripoli shortly after midnight as warplanes roared over the city.

Libyan rebel fighter Jaad Jumaa Hashmi cranks up the volume on his pickup truck's stereo when he heads into battle against Moammar Gadhafi's forces.

He looks for inspiration from a growing cadre of amateur rappers whose powerful songs have helped define the revolution.

Oil was up in Asian trade as escalating tensions in Libya, Syria, and Yemen heightened fears of supply disruption in the Middle East and North African region Agence France Presse reported on Monday.

New York's main contract, light sweet crude for delivery in June, rose 36 cents to $112.65 a barrel, while Brent North Sea crude for June gained 24 cents to $124.23 in the afternoon.

Insurgents bogged down in their bid to oust Moammar Gadhafi hailed Friday a U.S. decision to deploy armed drones over Libya, as Senator John McCain urged the world to recognize the rebels' council.

"We are so pleased," media liaison official for the rebels' Transitional National Council (TNC), Mustafa Gheriani, told Agence France Presse in Benghazi, their eastern stronghold.