CNN can not independently verify the authenticity of the message . Ayman al - Hassan calls for truce between Dar al - Islam , Islamic State of Iraq and Syria . He orders ISIS to advance on Iraq , where violence has reached the highest levels in years . Some 60,000 people have fled Syrian capital Deir Ezzor amid clases between the rival groups .
Ayman al - Hassan calls for truce between Dar al - Islam , Islamic State of Iraq and Syria . He orders ISIS to advance on Iraq , where violence has reached the highest levels in years . Some 60,000 people have fled Syrian capital Deir Ezzor amid clases between the rival groups .