But while Libya's transitional leadership worked to consolidate control over the entire country, the country's acting prime minister warned in a newspaper interview that Gaddafi can still cause trouble from his hiding place.
Mahmoud Jibril was quoted by the pan-Arab Asharq al-Awsat on Tuesday as saying that the ousted leader is moving between Niger, Algeria and the vast southern Libyan desert and has been trying to recruit fighters from Sudan to help him establish a separate state in the south, or to march to the north and destabilize the new regime.
The report could not be confirmed, but it underscored fears that the inability to catch Gaddafi, who escaped with two of his sons after revolutionary forces swept into Tripoli in late August, would allow him and his supporters to wage an insurgency.
"Gaddafi has two options: either to destabilize any new regime in Libya or to declare a separate state in the south," Jibril was quoted as saying, adding there was evidence about this but he didn't elaborate.
Suggesting that the US also was concerned about the possibility, Secretary of State Hillary Rodham Clinton said during a visit to Tripoli on Tuesday that she hoped Gaddafi would be captured or killed.
In Tripoli, meanwhile, Libya's transitional government said it has formally recognized the Syrian opposition's umbrella group as the country's legitimate representative, making it the first country to do so.
Hassan al-Sughayer, a member of Libya's National Transitional Council, announced the decision in Tripoli after meeting with members of the Syrian National Council, a broad-based opposition group that was formed in September. The Syrians were in the Libyan capital to drum up support for their 7-month-old uprising against President Bashar Assad.
The recognition is largely symbolic and unlikely to have any practical impact. Syria's government has threatened tough measures against any country that recognizes the opposition council.
Although two months have passed since Gaddafi fled Tripoli, Libya's new leaders have refrained from declaring national "liberation" until the fall of Sirte, which Gaddafi transformed from a fishing village into a modern city after he seized power in 1969.
Revolutionary forces on Tuesday pushed from the east into the small pocket of the city under the control of Gaddafi loyalists and captured a vegetable market, though they came under heavy fire from snipers and rocket-propelled grenades on the rooftops of residential buildings and homes along major streets.
On Wednesday, Wissam bin Hmade, the commander of one of the revolutionary brigades from the eastern city of Benghazi, said they had the Gaddafi supporters corralled in a 700sq m residential area but were still facing heavy rocket and gunfire from snipers holed up in surrounding buildings.
It took the anti-Gaddafi fighters, who also faced disorganization in their own ranks, two days to capture a single residential building.
It is unclear whether loyalists who slipped out of the besieged cities of Bani Walid, which was captured this week, and Sirte might continue the fight and attempt to organize an insurgency using the vast amount of weapons Gaddafi was believed to have stored in hideouts in the remote southern desert.
Unlike Iraq's Saddam Hussein, Gaddafi had no well-organized political party that could form the basis of an insurgent leadership. However, regional and ethnic differences have already appeared among the ranks of the revolutionaries, possibly laying the foundation for civil strife.
Gaddafi has issued several audio recordings trying to rally supporters. Libyan officials have said they believe he's hiding somewhere in the vast southwestern desert near the borders with Niger and Algeria.
The whereabouts of two of his sons also remain unknown, although commanders have said they believe Muatassim and Seif al-Islam are hiding in Sirte and Bani Walid, respectively. Seif al-Islam had been Gaddafi's likely choice to succeed him as Libya's leader.
Anti-Gaddafi fighters combed Bani Walid on Tuesday for signs of Seif al-Islam and other high-level regime figures in the desert enclave, 140km southeast of Tripoli.
"Seif was seen on Thursday. He was eating in a desert village close to the city," one field commander, Said Younis, said.
The Netherlands-based International Criminal Court has charged Seif al-Islam, his father and Gaddafi's former intelligence chief Abdullah al-Senoussi with crimes against humanity for a brutal crackdown on the uprising.
