It still appeared unlikely that U.S. warplanes or missiles soon would deploy in Libya, which has been sliding toward civil war, but the continuing violence increased pressure on Washington to do something or at least spell out its plan.
The rebels are fighting to oust Qaddafi from power after more than 41 years, a goal in common with the protesters who managed to topple authoritarian rulers in neighboring Tunisia and Egypt. However, the Libyan uprising has already proved much more violent, and could be much more drawn out.
In Benghazi, the main city in the rebel-held east of the country, a spokesman for the newly created Interim Governing Council said a man who claimed to represent Qaddafi has made contact with the council to discuss terms for Qaddafi to step down. Mustafa Gheriani told the AP the council could not be certain whether the man was acting on his own initiative or did in fact represent the Libyan leader.
"But our position is clear: No negotiations with the Qaddafi regime," said Gheriani, who declined to say when contact was made or reveal the identity of the purported envoy.
In Zawiya, the witness said electricity, phone and Internet services have all been cut. The witness spoke to the AP after he managed to escape the city through surrounding farmlands and reach a point outside Zawiya where mobile phone coverage was available.
"The city is in ruins," he said. "Some buildings have been entirely destroyed and everyone on the street is shot on sight. There are many wounded but the hospitals are running out of supplies," he said, describing conditions in the city after the regime's counteroffensive on Monday.
As the fighting continues, Qaddafi's regime is also coming under mounting pressure from some Arab nations.
Gulf Arab countries joined the calls for a no-fly zone, with the foreign minister of the United Arab Emirates saying during a conference of his country's neighbors that the U.N. Security Council should "shoulder its historical responsibility for protecting the Libyan people."
Still, Western military intervention does not seem imminent -- and the warnings may be an attempt to intimidate Qaddafi with words before deeds.
British and French officials said the no-fly resolution was being drawn up as a contingency and it has not been decided whether to put it before the U.N. Security Council, where Russia holds veto power and has rejected such a move.
Western officials have said a no-fly zone does not require a U.N. mandate, but they would prefer to have one.