Kurds' advance towards Mosul, ISIS terrorist group's stronghold, and killing of tens of terrorists, including four commanders, made ISIS headquarters to withdraw 3000 of their militants from Syria to prevent fall of Mosul, an informed security source told Alwaght correspondent in Mosul.
ISIS terrorists know that the fall of Mosul, the first province they occupied in June 2014 offensive, will lead to their complete failure in Iraq, and consequently will weaken their position in Syria.