The Islamic State militant group has released video which it says shows lines of Yazidi men and boys who have converted to Islam after being "enlightened".
Thousands of Yazidis were forced to flee the terror group in northern Iraq after being told they must convert or face death.
Hundreds who refused were captured, slaughtered and buried alive, witnesses say, while many women who avoided death were sent into slavery.
In the video, an Islamic State fighter says that those who fled to Sinjar Mountain should come down and convert - adding that aid from "western countries and crusader countries... is a lie".
A British family have told ITV News of their devastation after discovering a close relative is fighting with the Islamic State in Iraq.
A French journalist who was held hostage with James Foley in Syria has told ITV News it was "devastating" to see his murder.