Isa Dare, the son of 'Khadija' Dare from south east London, pushes the button that blows up four alleged spies sitting in a white car behind him.

Standing triumphantly next to the charred remains of the car, his hand raised to the sky, the boy then yells: 'Allahu Akbar.'

It is the second time the young boy, who was brainwashed after his mother took him to Syria three years ago, has appeared in one of the extremists' propaganda videos, Daily Mail reports.

His grandfather told of how the child begged him to save him just days before he was forced to appear in the first video last month.

In what was seen as a 'promotion' of this latest murderous release, Dare was made to declare: 'We are going to kill the kuffar [non-believers] over there' - before pointing to the men killed in today's video.

Today's video, which is believed to be shot in ISIS's de facto capital of Raqqa, was entitled: 'They are the enemy so be aware of them.'

Before the prisoners killed, the senior ISIS commander standing next to the boy threatened British Prime Minister David Cameron for arming the terror group's enemies in Syria.

His grandfather, Henry Dare, 59, said Isa made a desperate plea for help during a heartbreaking phone call just days before he featured in the barbaric stunt, saying: 'Please save me.'

It later emerged that Isa's father had made a desperate attempt to rescue his son after his estranged wife fled to Syria and married an ISIS terrorist.

Asked if he thought his grandson had any idea what he was saying in the video, Mr Dare – of Deptford, south east London – said: 'No – he's a kid.

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