Libyan leaders have said they want to make sure "everybody knows Gaddafi is dead"
Libya's authorities have come under pressure to give a full account of the death of ex-leader Col Muammar Gaddafi.
His burial has been delayed with officials divided about what to do with the body. A post-mortem is expected.
Nato says it will end its campaign in Libya by 31 October.
The alliance's Secretary General, Anders Fogh Rasmussen, said that as the mission winds down, Nato "will make sure there are no attacks against civilians during the transition period".
Nato's seven-month campaign of air strikes was carried out under a UN mandate authorising the use of force to protect civilians in Libya.
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For the people here the manner of the colonel's death matters little. What counts is that he's gone, and crucially, that Libyans believe he won't be coming back.
That perhaps in part explains the delay to the funerals. But as details emerge about his final moments questions are being raised to which at the moment there are no clear answers.
Col Gaddafi was captured alive. People we've spoken to say he was relatively unharmed. But then he was set upon by an angry mob. In mobile phone footage fighters could be heard arguing over whether or not to kill him. Several hours later he was pronounced dead from a bullet wound to the head. No-one knows who fired the shot.
Visits to freezer Analysis
That perhaps in part explains the delay to the funerals. But as details emerge about his final moments questions are being raised to which at the moment there are no clear answers.
Col Gaddafi was captured alive. People we've spoken to say he was relatively unharmed. But then he was set upon by an angry mob. In mobile phone footage fighters could be heard arguing over whether or not to kill him. Several hours later he was pronounced dead from a bullet wound to the head. No-one knows who fired the shot.
Hundreds of Libyans have been queuing to get a glimpse of the body of Col Gaddafi in a meat storage room in Misrata.
Officials, including acting Prime Minister Mahmoud Jibril, have also been to see the corpses.
Oil Minister Ali Tarhouni told Reuters news agency Col Gaddafi would not be released for immediate burial.
"I told them to keep it in the freezer for a few days... to make sure that everybody knows he is dead," he said.
It is unclear whether the ex-leader will be buried in Misrata, in his hometown of Sirte, where he and his son were captured, or elsewhere.
Officials from the National Transitional Council (NTC) have said they will conduct a secret burial and there is some speculation that they might even try to bury him at sea, as happened with al-Qaeda leader Osama Bin Laden, to prevent any grave being turned into a shrine.
Autopsy
Meanwhile, questions are mounting as to exactly what happened in Col Gaddafi's last moments following his capture.
Mr Jibril said Col Gaddafi had been shot in the head in an exchange of fire between Gaddafi loyalists and NTC fighters in Sirte.
Video footage suggests he was dragged through the streets.
It is believed Colonel Gaddafi and his entourage had been trying to flee Sirte
Misrata's chief forensic doctor, Othman al-Zintani, told al-Arabiya TV that full autopsies would be carried out on the bodies of Col Gaddafi and his son.
Senior NTC member Mohammed Sayeh told the BBC he doubted that the colonel had been deliberately killed, but added: "Even if he was killed intentionally, I think he deserves this."
In Washington, state department spokesman Mark Toner said the NTC "has already been working to determine the precise cause and circumstances of Gaddafi's death, and we obviously urge them to do so in an open and transparent manner as we move forward".
But Russia's Foreign Minister Sergei Lavrov said the "way his death happened poses an entire number of questions".
Mr Lavrov called for a full investigation, echoing a similar call by UN Human Rights Commissioner Navi Pillay.
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NEXT STEPS
- National Transitional Council to issue a "declaration of liberation"
- Elections for a Public National Conference to be held within 8 months
- The new body is to appoint a prime minister, an interim government and a Constituent Authority which will draft a new constitution within 60 days
- Constitution to be put to a referendum
- If the constitution approved, general elections will be held within six months
Her spokesman Rupert Colville told the BBC that the killing could have been illegal.
However, correspondents say few Libyans are worried about the manner of their former dictator's humiliating end. Celebrations continued late into the night across Libya.
The NTC is expected to formally announce the liberation of the country during the weekend.
Col Gaddafi, who came to power in a coup in 1969, was toppled in August. He was making his last stand in Sirte alongside two of his sons, Mutassim and Saif al-Islam, according to reports.
There are conflicting reports as to the whereabouts of Saif al-Islam, and Col Gaddafi's security chief - who are both at large.
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