The US-led coalition has killed as many as 150 Islamic State terrorists in an operation in the middle Euphrates River Valley in Syria. According to a statement from the coalition, the air strikes took place on Saturday near Al-Shafah in Deir Ezzor province.<br/>'<br/>While the terror group has lost most of the terrain it once controlled in Syria, it still remains entrenched in pockets along the middle Euphrates River Valley.<br/><br/>