蜜芽传媒

Syrian refugee Alaa described how her 17 year-old brother Ali was tortured and murdered by Islamic State (IS).

Scenes of his torture and execution were then posted on Facebook and seen by Alaa's family.

Alaa said IS are "mercilessly killing people" and anyone who joined them "would be ruining your lives...if you think you can join the Islamic State and change your mind later, forget it, death will be awaiting you."

This clip is originally from 5 live Daily on December 10 2014.