BEYIDA, Libya — Rebels holding Libya's third- and fourth-largest cities Thursday repulsed tank-backed assaults by Moammar Gadhafi's forces as the embattled dictator struggled to reclaim areas outside the capital and fresh high-level defections further fractured his regime, residents and news reports said.
President Obama and other Western leaders worked to firm up responses to halt a crackdown that's widely feared to have killed more than 1,000 people over the nine-day revolt. The U.S. and its NATO allies were actively considering the imposition of a no-fly zone over Libya to stop regime air strikes on civilians.
In his latest diatribe over state-run television Thursday, Gadhafi claimed that al Qaida leader Osama bin Laden had instigated the rebellion, and admitted that his forces were losing control of Zawiya, 30 miles west of Tripoli.
"In Zawiya, this is unbelievable," Gadhafi said. "People claim they are engineers and teachers and lecturers, so they should have reasonable demands. But these people have no reasonable demands. Their demands are being dictated to them by bin Laden. People of Zawiya, your sons are being duped by bin Laden."
"Zawiya is slipping from our hands because your sons are listening to bin Laden," he ranted, adding ironically that "A real man doesn't use arms against innocent people."
About 100 people died in four hours of fighting in Zawiya that erupted in the morning and ended with Gadhafi's forces retreating, said a former senior diplomat reached by phone. The city has a population of about 100,000 and is Libya's fourth largest city.
During the battle, Gadhafi loyalists fired automatic weapons and an anti-aircraft gun at a mosque where protesters, some armed with hunting rifles, had camped for days, said a witness quoted by the Associated Press.
The city's defenders — former security forces and civilians armed with weapons seized from local military bases — labored throughout Thursday evening preparing defenses around the main square for what they feared would be a new assault during the night or early today.
"The people are crowded into Martyrs Square and getting themselves ready to fight," said the former senior diplomat, who asked that his name be withheld for his safety. "We have no choice. We will fight or we will die. There is no peace with Gadhafi, as you know."
Zawiya and two towns east of Tripoli, Misrata and Tajura, were the targets of efforts by Gadhafi to retake the region beyond the capital, where bloody onslaughts by his troops and African mercenaries appear to have crushed the uprising for now.
Misrata, the country's third-largest city, with a population of some 300,000, remained in rebel hands.