Nine-year-old sex slave is made pregnant by 10 ISIS militants raping her, says aid worker

  • Female Yazidi held prisoner by ISIS, suffered horrific sexual abuse
  • Victims include girl, nine, who is now 'pregnant by her abusers' 
  • Earlier this week, ISIS released 216 Yazidi prisoners in northern Iraq
  • Group, made up of 40 children, women and elderly, released after a year