Muammar Gaddafi died from a gunshot wound, a doctor involved in an overnight autopsy on the former Libyan leader's body told Reuters on Sunday.

"He died because of a gunshot wound. It is obvious," the doctor said, giving no details about whether it was from an apparent gunshot wound on the left side of Gaddafi's head.

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"There are still several issues. We have to pass (the report) to the prosecutor general. But everything will be revealed publicly. Nothing will be hidden."

The autopsy was carried out at a morgue in the city of Misrata, about 200 km (130 miles) east of Tripoli. Local officials said Gaddafi's body would now be brought back to the cold store at an old market in Misrata where it has been on public display.

"We worked all through the night. We just got done," said a medical source, who spoke on condition of anonymity.

Meanwhile, Libyan rebel sources told US news outlet NBC on Saturday that Gaddafi's son Saif al-Islam was captured alive and uninjured.

The rebels said that Saif al-Islam Gaddafi was captured along with former spokesman for the Gaddafi regime, Moussa Ibrahim, near the former Gaddafi stronghold of Bani Walid and was being transported to Misrata.

The reports of the capture of Gaddafi's son could not be verified.

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