Al Jazeera latest updates:
The AFP newsagency, quoting the coalition, says Gaddafi's military control centre was the target of strikes on Sunday and was destroyed.
Libyan officals took journalists to see what they claimed was the damage from a missile attack. Officials said the missiles had struck very near to Gaddafi's tent.
Anita McNaught, Al Jazeera's correspondent in Tripoli, said journalists taken to the scene asked officials why there was no smoke or fire. One official said he didn't know because he wasn't a military expert.
UK defence secretary Liam Fox has told BBC Radio 5 that targeting Gaddafi himself - something the United States has thus far denied doing - could "potentially be a possibility" if civilians would not be harmed.
Robert Gates, the US defence secretary, responded negatively to Fox's comments. He said expanding the coalition's goals could divide it and that it was "unwise" to set such specific goals that might be unachievable.
Amr Moussa, the secretary general of the Arab League, appeared to backtrack on the League's support for the coalition yesterday, saying the jet and cruise-missile strikes "differ[ed] from the aim of imposing a no-fly zone."
Moussa and his colleagues had asked the UN Security Council days before to institute a no-fly zone and left it up to the member states as to how it might be carried out, so yesterday's remarks had some observers scratching their heads.
Today, UK foreign secretary William Hague attempted a bit of damage control. Hague said he had spoken with Moussa, who still supported the coalition.
"I think too much was made of Amr Moussa's comments," he said. "I will be talking to him again today."
Iraq's government has expressed support for international efforts to "protect Libyan people," a spokesman said, according to Reuters.
Well, the UN-sanctioned air strikes are having an affect, or everyone who was going to flee Libya has already fled; either way, the UN Refugee Agency says it has seen a decrease in the flow of Libyans leaving for Egypt in the past 48 hours.
Some Libyans in Egypt have also returned to their country, a spokeswoman for the agency said.
Meanwhile, the violence continues inside Libya. Rob Crilly, a correspondent for the Telegraph newspaper, tweets that he was halted during an attempt to get into Ajdabiya - south of Benghazi - because rebels in front of him were caught in an ambush and four were killed. Rebels may still be trapped inside Ajdabiya by pro-Gaddafi troops, he says.
UN chief Ban Ki-moon, who spoke with Amr Moussa in Cairo today, was mobbed by dozens of pro-Gaddafi demonstrators today, the AFP reports. Ban was going to walk to Tahrir Square, the heart of the Egyptian revolution, but the demonstrators forced his delegation back into the Arab League.
The Guardian newspaper's Chris McGreal was on the road today near Ajdabiya, around 160km south of Benghazi, where Gaddafi troops are still fighting with rebels. That appears to be the current front line. The rebels, he says, view the coalition airstrikes "as part of their campaign." That's not what the West wants to hear; they're trying to keep themselves from becoming embroiled in a full-scale regime change effort.
Namik Tan, the Turkish ambassador to the United States, has written on Twitter that the four New York Times journalists - two reporters and two photographers - "are on their way to leave Libyan border and will be delivered to US officials."
Since US diplomatic personnel have withdrawn from Libya and the embassy has been shut down, Turkey is serving as the protector of US interests in the country. Tan said they were released this morning after negotiations between Turkey and Libya.
Swiss journalist Gaetan Vannay has been in the western city of Zintan for the past nine days and says the eastern outskirts of the city are currently under fire and have been since yesterday.
The head of Britain's armed forces has told AFP news agency that Libyan leader Muammar Gaddafi was "absolutely not" a target for military action.
General Sir David Richards, the chief of the defence staff, was speaking after British Foreign Secretary William Hague refused to rule out that air strikes could specifically target Gaddafi.
In an interview with BBC radio earlier, Hague declined to be drawn into the details of military targets.
Vladimir Putin, Russian prime minister, said on Monday a UN resolution authorizing military action in Libya resembled "mediaeval calls for crusades" after Western forces launched a second wave of air strikes.
European Union foreign minister are meeting in Brussels to discuss ongoing situation in Libya.
Jacob Zuma, the South African president, said on Monday that his country does not support "the regime change doctrine" in Libya, and called for restraint from foreign countries enforcing a no-fly zone.
As South Africa we say no to the killing of civilians, no to the regime change doctrine and no to the foreign occupation of Libya,", one of five heads of state on a high-level African Union panel on Libya.
There are reports of heavy shelling by pro-Gaddafi troops in western city of Zintan.
Iran condemns military intervention in Libya, AFP news agency reported Khamenei as saying.
Libyan opposition National Council says eastern gate of Ajdabiya has been recaptured.
Burnt-out vehicles line on the road between Ajdabiya and Benghazi, Al Jazeera correspondent reports.
Libyan rebels say pro-Gaddafi troops in Misurata are using a number of civilians from neighbouring towns as human shields.
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