A missile strike on Libyan leader Col Gaddafi's compound in Tripoli has destroyed a building which coalition¹ officials said was a command centre.

利比亚领导人卡扎菲的一座建筑遭导弹袭击，联盟官员称这是一座指挥中心。

Journalists were shown the ruined building in Col Gaddafi's Tripoli compound
Journalists were shown the wrecked² building but it was not clear if there were any casualties.

It comes as a coalition of countries including the US, UK and France continue strikes to enforce a UN-mandated no-fly zone over Libya.

Col Gaddafi has been fighting a rebellion that broke out last month.

US officials have said Col Gaddafi himself is not a target of the air strikes, which they say are aimed at his armed forces and air defence systems.

'Very effective'

On Sunday night anti-aircraft fire rose over Tripoli and several explosions were heard. A BBC reporter saw a column of smoke rising from the direction of Bab al-Aziziya, where Col Gaddafi has his military base and compound.

Western journalists taken by Libyan officials to the compound were shown a ruined three or four-storey building that the Libyans said had been bombed by the allied³ forces.

An official from one of the coalition countries, who asked not to be named, told journalists the strike destroyed Col Gaddafi's "command and control capability⁴".

Earlier at the Pentagon, Navy Vice⁵ Adm William Gortney said the military action, which began on Saturday, had been "very effective in significantly degrading the regime's air defence capability".

He said ground forces moving on rebel positions were also open to attack. But he added that neither Col Gaddafi nor his residence would be targeted.

A US official cast doubt on a Libyan government claim that its armed forces were observing a ceasefire（停火） , despite claims to that effect on Friday and Sunday.

President Barack Obama's national security adviser⁶ Tom Donilon said the ceasefire "isn't true or has been immediately violated".

The BBC's Allan Little in Tripoli says pro-Gaddafi troops have tried to enter Benghazi and have been in action at Misrata.

A rebel spokesman in Misrata told the BBC that pro-Gaddafi forces had launched fresh attacks on Sunday with heavy shelling.