Tripoli, Libya (CNN) -- Libya's interim leadership gave residents in Bani Walid a 48-hour notice to leave the city as it sent reinforcements there and to the former regime's other remaining strongholds of Sirte and Sabha. As the National Transitional Council sought to assert control over all of Libya, the U.S. assistant secretary of state for Near Eastern affairs, Jeffrey Feltman, arrived Wednesday in Tripoli on an unannounced visit. Feltman met with NTC head Mustafa Abdel Jalil and Mahmoud Jibril, chairman and head of international affairs of the NTC, as well as with many civil society representatives. "I am encouraged by these individuals and these organizations' efforts," Feltman said.
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NEW: Draft Security Council resolution expected to be voted on in a few days
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"Do not think that the battle is over," says man identified as Gadhafi spokesman
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Dirak air base taken by anti-Gadhafi fighters
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Gadhafi spokesman vows to fight on
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"What an incredible accomplishment it is that we can meet and speak freely today," he said, adding that Americans were "inspired by (@placeholder') courage and determination."
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Ahamda Almagri said his column of some 500 anti-Gadhafi fighters captured the military air base at @placeholder and arrested two Gadhafi loyalists; some 70 other loyalists fled the air base, which is the second-largest such facility in the south.
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Gadhafi
Ahamda Almagri said his column of some 500 anti-Gadhafi fighters captured the military air base at Dirak and arrested two @placeholder loyalists; some 70 other loyalists fled the air base, which is the second-largest such facility in the south.
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The interim government was still struggling with the three @placeholder strongholds that remained in loyalist hands.
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At a checkpoint about nine miles outside @placeholder, families who had driven from the city complained of difficult conditions inside, including limited food and water.
Mustafa Abdel Jalil
@placeholder has said his goal is to create "a state of institutions, a state of law" in Libya.
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The sacrifices that @placeholder made during the revolution will be worth it; women, for one, will have a stronger political role, he said.