Libya's provisional government fighters say they are close to taking full control of former leader Moammar Gadhafi's hometown of Sirte.

National Transitional Council forces say they seized the city's police headquarters on Tuesday, days after taking the main hospital, the university and the convention center that Gadhafi loyalists had used as their main base of operation.

NTC chairman Mustafa Abdel Jalil told the Reuters news agency Tuesday that provisional forces needed two more days to take control of Sirte.

NTC officials have said the capture of Sirte will allow them to declare the country liberated, because it will mean the provisional government controls all of Libya's ports and harbors.

NATO said Tuesday it had no evidence of any significant pro-Gadhafi activities in Libya outside of Sirte and the southern city of Bani Walid. A spokesman said the remaining pro-Gadhafi fighters cannot change the outcome of the conflict, and their behavior “does not make sense.”

Sirte is 360 kilometers east of Libya's capital, Tripoli, and has served as a center of support for Mr. Gadhafi. Anti-Gadhafi fighters have been trying to move into the city for three weeks.

In Bani Walid, revolutionary fighters have retreated from the town center after facing heavy sniper fire and booby-traps, but they still hold the airport and two nearby villages.

NATO said it carried out airstrikes on the city Tuesday, hitting six military vehicles.