The Facebook incident comes amid complaints from human rights groups about waning public interest in the plight of women held as prisoners by the Islamic State. The organization Human Rights Watch, citing estimates by Kurdish officials in Iraq and Syria, says the terrorist group holds about 1,800 women and girls, just from the capture of Yazidi towns in the region. After initial denials, the Islamic State last year issued statements acknowledging the use of sex slaves and defending the practice as consistent with ancient Islamic traditions, provided that the women are non-Muslims captured in battle or members of Muslim sects that the terrorist group regards as apostates.