TRIPOLI, Libya -- Euphoric Libyan rebels took control of most of Tripoli in a lightning advance Sunday, celebrating the victory in Green Square, the symbolic heart of Moammar Gadhafi's regime. Gadhafi's defenders quickly melted away as his 42-year rule crumbled, but the leader's whereabouts were unknown and pockets of resistance remained.

State TV broadcast Gadhafi's bitter pleas -- in audio only -- for Libyans to defend his regime. Opposition fighters captured his son and one-time heir apparent, Seif al-Islam, who along with his father faces charges of crimes against humanity at the International Criminal Court in the Netherlands. Another son was under house arrest.

"It's over, frizz-head," chanted hundreds of jubilant men and women massed in Green Square, using a mocking nickname of the curly-haired Gadhafi. The revelers fired shots in the air, clapped and waved the rebels' tricolor flag. Some set fire to the green flag of Gadhafi's regime and shot holes in a poster with his image.

The startling rebel breakthrough, after a long deadlock in Libya's 6-month-old civil war, was the culmination of a closely coordinated plan by rebels, NATO and anti-Gadhafi residents inside Tripoli, rebel leaders said. Rebel fighters from the west swept over 20 miles over a matter of hours Sunday, taking town after town and overwhelming a major military base as residents poured out to cheer them. At the same time, Tripoli residents secretly armed by rebels rose up.

When rebels reached the gates of Tripoli, the special battalion entrusted by Gadhafi with guarding the capital promptly surrendered. The reason: Its commander, whose brother had been executed by Gadhafi years ago, was secretly loyal to the rebellion, a senior rebel official, Fathi al-Baja, told AP.

By early today, rebels controlled most of the capital. The seizure of Green Square held profound symbolic value: The plaza hosted pro-Gadhafi rallies organized by the regime almost every night, and Gadhafi delivered speeches to his loyalists from the historic Red Fort that overlooks the square.

Regime hasn't surrendered

Rebels and Tripoli residents set up checkpoints around the city, though pockets of pro-Gadhafi fighters remained. In one area, AP reporters with the rebels were stopped and told to take a different route because of regime snipers nearby.

In a series of angry and defiant audio messages broadcast on state TV, Gadhafi called on his supporters to march in the streets of the capital and "purify it" of "the rats."

His defiance raised the possibility of a last-ditch fight over the capital, home to 2 million people. Government spokesman Moussa Ibrahim claimed the regime has "thousands and thousands of fighters" and vowed: "We will fight. We have whole cities on our sides. They are coming en masse to protect Tripoli to join the fight."

But it seemed that significant parts of Gadhafi's regime and military were abandoning him. His prime minister, Al-Baghdadi Al-Mahmoudi, fled to a hotel in the Tunisian city of Djerba, said Guma el-Gamaty, a London-based rebel spokesman.

'Clearly crumbling'

NATO Secretary-General Anders Fogh Rasmussen said Gadhafi's regime was "clearly crumbling" and that the time to create a new democratic Libya has arrived.

It was a stunning reversal for Gadhafi, who earlier this month had seemed to have a firm grip on his stronghold in the western part of Libya, despite months of NATO airstrikes on his military. Rebels had been unable to make any advances for weeks, bogged down on the main fronts with regime troops in the east and center of the country.

The rebels' leadership council, based in the eastern city of Benghazi, sent out mobile text messages Sunday to Tripoli residents, proclaiming, "Long live Free Libya" and urging them to protect public property. Internet service returned to the capital for the first time in six months.

The day's first breakthrough came when hundreds of rebels fought their way into a major symbol of the Gadhafi regime: the base of the elite 32nd Brigade led by another Gadhafi son, Khamis. Fighters said they saw little resistance. They were 16 miles from the big prize, Tripoli.

Rebel chief Mustafa Abdel-Jalil in Benghazi confirmed that the rebels captured Seif al-Islam but refused to give details.

Another son, Mohammed, was under house arrest. The chief of Libyan telecommunications, he appeared on Al-Jazeera, saying his house was surrounded by armed rebels.

On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra and Matt Lindsay take a look top boys and girls basketball players on Long Island. Credit: Newsday

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On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra and Matt Lindsay take a look top boys and girls basketball players on Long Island. Credit: Newsday

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