(THE TELEGRAPH) -- Al-Qaeda linked terrorists that control swathes of Iraq and Syria have circulated a video compilation of hundreds of graphic executions to mark the Muslim religious festival of Eid.
Accompanied by an explicit threat to Iraqi soldiers , the group formerly known as the Islamic State of Iraq and al-Sham (Isis), showed dozens of young men men cowering in the shadow of gunmen before being brutally slaughtered.
People inspect the destroyed Mosque of The Prophet Younis (AP)
A group of soldiers are led to a desert pit that will soon become a mass grave.
Others are seen standing on a small river jetty before shuffling forward where they are shot in the head and fall into the water. The executions take place in Saddam Hussein's hometown Tikrit.
Another sequence shows Isis gunmen in a fast car firing on traffic, riddling other vehicles with bullets in an apparently random killing spree.
The 30-minute clip shows tracksuit bottoms being removed from men to reveal combat trousers underneath in an apparent justification that they are soldiers being slain.
Many pleas for mercy are heard on the audio as the victims are killed.
The group's leader Abu Bakr al-Baghdadi has declared an Islamic caliphate in the wake of the takeover of Mosul, Iraq's second city.