Militant video shows 18 Turkish workers kidnapped in Iraq

The 3-minute video released on Friday shows the men seated in front of five militants in black masks with machineguns. Behind them is a blue wall emblazoned with the group's alleged name, "Death Squads" in Arabic.

Next to the name are the words "Oh, Hussein" — a reference to a revered Shiite figure who was the Prophet Muhammad's grandson, suggesting the group is Shiite.