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An horrific jihadist video released by a new network of extremist thugs in Iraq has been released showing mass executions, drive-by murders and sniper headshots.

The twisted video, overlaid with stirring music was released as Muslims throughout the world mark the end of Ramadan with the festival of Eid.

It was released by the Islamic State of Iraq and al-Sham and shows hundreds of Iraqi members of the security forces being taken by truck out into the desert and to their deaths.

Even though they beg for their lives, many of them in their 20s and with their hands tied, they are coldly shoved towards a shallow grave and filmed.

None of the men appear more than 40 years old and one of them wears an Arsenal shirt, marked with star player Mesut Ozil’s name and number on the back.

One young man has his tracksuit trousers pulled down to reveal that he is wearing military fatigues, as purported proof that he had served in the security forces.

Shortly after they are shot dead in the back and the hand by masked men, casually holding their AK47 assault rifles as they pull the trigger.

The well edited footage shows prisoners summarily executed and even suicide bombers boasting before blowing up buildings.

The most chilling passage shows the terrified prisoners piled into the back of trucks, where they hold each other and huddle in fear before driven off to their deaths.

The executions are thought to have happened recently as ISIS stormed Saddam Hussein’s hometown of Tikrit, led by some of his former officers.

Prisoners are also shown being hit with rifle butts and shoes whilst they march blindfolded.

Unable to see, they hold the shoulder of the man in front. The chain of men is led down some stairs to a small jetty, the wood splattered with blood.

One by one, they are taken by one of the jihadists to the edge of the jetty, where they are shot in the head with a pistol and their body tossed into the water.

In another scene a number of drive-by shootings are casually taken out.

Fighters from ISIS shoot up cars as they overtake clearly raking the enemy car with bullets and even then pursuing the wounded driver and passengers, executing them by the side of a road.

The group recently changed its name to the Islamic State and had formed a caliphate across Syria and Iraq, under the leadership of its caliph, Ibrahim Abu Bakr al-Baghdadi.

It is thought hundreds of British fighters may have joined ISIS and could return to Britain to cause murder and mayhem.