They beat and killed some of those who defended it, fired celebratory shots in the air and hauled off crates of weapons and trucks with guns mounted on the back.

British Foreign Secretary William Hague said Qaddafi’s regime was on its last legs after rebels fought their way into the Libyan leader’s compound.

“Clearly these are continuing successes by the Free Libya forces, it does show that this is really the death throes of the Qaddafi regime,” Hague told Sky News television.

“It is a historic achievement for the people of Libya that they are at this point.”

He spoke moments after the rebels overran Qaddafi’s fortified Bab Al-Aziziya compound in Tripoli, although there was no immediate word on the dictator’s whereabouts.

In other parts of the capital, the rebels said they were also in control of the state television.

They raised the flag on the top of the building.

Rebels claimed they also control the airport.

Libya’s former deputy ambassador to the UN said he expected the entire country will be in rebel hands within 72 hours.

Ambassador Ibrahim Dabbashi, who with other diplomats has continued to work at the Libyan mission since disavowing Qaddafi in February, said he expects Libya will be “totally liberated.”

“It’s over! Qaddafi is finished!” yelled one fighter over a cacophony of celebratory gunfire across the Bab Al-Aziziya compound, from where Qaddafi orchestrated eccentric defiance of Western powers and disdain for his own people for four decades.

The Western powers who backed the revolt with air power held off from pronouncing victory although a swift return to order is high on their priorities, given fears that ethnic and tribal divisions among the rebels could descend into the kind of anarchy that would thwart hopes of Libya resuming oil exports.

Rebel National Council chief Mustafa Abdel-Jalil cautioned: “It is too early to say that the battle of Tripoli is over. That won’t happen until Qaddafi and his sons are captured.”

Armed men broke up a gilded statue of Qaddafi, kicking its face. Some seized the golf buggy the leader often used.

Another rebel sported a heavily braided, peaked military cap of a kind favored by the colonel, who seized power in 1969. He said he had taken the hat from Qaddafi’s bedroom after a brief few hours of resistance by a loyal rearguard died away.

Abdel Hakim Belhadj, a rebel commander, said he did not know where Qaddafi or his sons were: “They ran like rats.”

Other rebel officials said they believed the 69-year-old “Brother Leader” was probably still not far away.

Reuters correspondents in Tripoli said there still appeared to be some hostile fire around the city center as darkness fell and looting continued.

The Russian head of the International Chess Federation, who had visited Tripoli in June, said Qaddafi had called him on Tuesday.

Kirsan Ilyumzhinov said Qaddafi told him he was in the capital and was “prepared to fight to the end.”

Qaddafi had few places to make a stand.

His home town of Sirte, on the Mediterranean coast between Tripoli and rebel Benghazi, was expected to welcome rebel forces shortly, Abdel-Jalil said.

“It really looks like it’s pretty much over,” said David Hartwell, a Middle East analyst at IHS Jane’s in London.

“There might be a few diehards who would keep going until he is captured or killed, but not many. And if Qaddafi didn’t have many places to hide before, he has even fewer now.”

“House to house! Room to room!” chanted some men, calling for a search of the sprawling complex of bunkers and tunnels in a mocking echo of the words Qaddafi used six months ago when he threatened to crush early stirrings of the Arab Spring revolt.

Rebel leader Abdel-Jalil said NATO bombs had helped his men breach the walls of the Bab Al-Aziziya on Tuesday.

The US State Department, in a signal of the kind of activity likely to gather pace in diplomatic meetings over the coming days, said it was seeking the immediate release of up to $1.5 billion of frozen Libyan government assets to the rebels.

In Tripoli, ordinary Libyans, or at least those with guns and guts to risk the chaos in Bab Al-Aziziya, were helping themselves to the bounty Qaddafi’s inner circle had amassed in villas dotted around the city center compound.

Flat screen televisions and hi-fi, as well as a vacuum cleaner and Cuban cigars, were all being hefted away along with the sort of trophy rifles and handguns favored by the elite.

One man shouted angrily at those taking away loot: “People have died and you are stealing!“

For many, the most important benefit was not tangible: “Qaddafi is now gone and we are free,” said Turqi, a shopkeeper in the capital where civilians have kept indoors during three days of sporadic sniper fire and skirmishing.

In Washington, a Pentagon spokesman said he believed Qaddafi was still in Libya and remained a threat.

He also said the US was monitoring chemical weapons sites in Libya given worries that groups hostile to Western interests could try to seize stocks once accumulated by Qaddafi.

There were growing concerns for civilians in Tripoli, after days of siege and fighting in which officials suggested hundreds of combatants might have been killed or wounded.

Aid agencies said they hoped to get supplies in soon.

At a private house several miles from the center, wounded from the fighting were being treated, to the sound of gunfire.

“We need medication and stretchers, this situation is a disaster,” medical student Shuaib Rais said.

After Qaddafi’s son and long-time heir-apparent Seif Al-Islam confounded rebel claims of his capture by appearing to journalists at the Bab Al-Aziziya compound early on Tuesday, several analysts said the credibility of the disparate opposition movement had suffered a serious setback.

Though the basis of Seif Al-Islam’s claims that his father’s supporters were winning the war was also threadbare, confusion among the rebels, who seemed to have allowed two of Qaddafi’s sons to escape on Monday, embarrassed their supporters.

Noman Benotman, senior analyst at Britain’s Quilliam think tank and an associate of Qaddafi’s former spy chief, said: “Qaddafi is banking on the rebels making a mess of Tripoli and causing chaos. He is relying on them to behave badly. They want rival militia zones to start springing up ... It’s critical for the rebels to get their act together.”

The lack of clear control has revived talk that the sprawling, thinly populated desert state could fall into the kind of instability that has beset Iraq since Saddam Hussein’s overthrow. Qaddafi loyalists and anti-Western militants could exploit Libya’s ethnic, tribal and political divisions.

Rebel officials say they have a force ready to impose order in the capital, as they have generally done in parts of the country they have taken since February.

But it is not yet clear how they will handle Libya’s traditional east-west divisions if they consolidate their grip on the country.

The uncharacteristically efficient rebel advance into Tripoli, coordinated with an uprising inside the city, seemed evidence to some analysts of the military advice and training Western and some Arab powers, including Qatar, have provided.

Many assume special forces are also active on the ground.

Outside powers, including US President Barack Obama, have been at pains to characterise the revolt against Qaddafi as quite different from the Western assault on Saddam, saying it is a home-grown uprising.