ISIS fighters are being told by their commanders to rape captive women TEN TIMES to turn them into Muslims.
A victim claims the horrifying order was written in a letter that she saw before she was passed around a group of jihadis.
The woman, who has not been identified, told the Sun: "Anyone who doesn't convert to Islam, we will kill the males and marry the girls."
The UN estimates that around 3,500 people – mostly women and children , many of them members of the minority Yazidi community - are being kept as sex slaves.



