NEW : Witness says the prisoners were killed by retreating Gadhafi troops . NEW : Lockerbie bomber is comatose and dying , his family says . His family says al-Megrahi is in his last days of a battle with cancer , dimming hopes that he would shed more light on the 1988 attack that killed 270 people . Unknown : A badly scarred nanny says she was tortured by woman 's brother - in - law . Rebels have given Gadhafi forces in Sirte until Monday to disarm , rebel official says .
NEW : Witness says the prisoners were killed by retreating Gadhafi troops . NEW : Lockerbie bomber is comatose and dying , his family says . Unknown : A badly scarred nanny says she was tortured by woman 's brother - in - law . Rebels have given Gadhafi forces in Sirte until Monday to disarm , rebel official says .