
Grinning with delight and clutching their weapons, these are the smiling teenage boys preparing to execute five innocent men after ISIS militants asked for volunteers to assassinate them for rejecting Islam.

The five captives, who had all been convicted of apostasy, were led into the middle of a crowd by members of the terror group in Nineveh, Iraq.

They were all dressed in red overalls and were blindfolded before being forced to kneel on the ground.

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One young boy who was selected could hardly contain his delight and was seen smiling as he was handed a gun to carry out the killing

Even as he pointed the weapon straight at the head of one of the prisoners, he was still grinning, happy he had been picked

Another youngster wearing cut-off trousers and a baseball cap even smiled for the camera, just moments before shooting the men dead

Footage then shows one ISIS militant preach to the large crowd and declare that they had been sentenced to death

He then appears to ask for volunteers to step forward to execute the men.

And shockingly, five young men raise their hands to offer to carry out the executions with some of them appearing eager to be picked.

Men guarding the prisoners then hand shotguns over to the chosen crowd members and they all appear delighted as they stand behind the victims pointing their weapons at them.

And as the baying crowd begins to shout and chant, after a short countdown, they then start to fire their weapons as the prisoners fall to the floor.

Earlier, the ISIS prisoners are brought out into the middle of a baying crowd in Iraq where the terror group declare they have been sentenced to death of apostasy

They then asked for volunteers to step forward to carry out the executions and several young men seem eager and keen to be selected

Two of the men step up after raising their hands to volunteer to execute the prisoners by shooting them in the head

The volunteers fire several rounds of bullets and one of the men when he is finished appears to fire a celebratory shot into the air.

The bodies of the prisoners are then just left in the middle of the crowd while they cheer.

The brutal execution comes as ISIS have stepped up their campaign of violence in Iraq in recent days.

The volunteers then fired their weapons at the prisoners and they all fell to the ground as they bullets were fired

Afterwards the bodies of the prisoners were just left on the ground as one prisoner, right, appeared to fire a celebratory shot in the air

Earlier today a twin suicide bombing hit a police station in Baghdad's westernmost suburb killing at least five policeman.

The suicide bombers hit a police station in the suburb of Abu Ghraib and also wounded 12 people.

ISIS extremists still control significant areas in northern and western Iraq, including the second-largest city of Mosul.