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A barbaric public execution being staged by Islamic State fighters was stopped in its tracks as a British missile wiped out a sniper.
The extraordinary footage shows a crowd of civilians being forced at gunpoint to gather in the Syrian town of Abu Kamal to watch the spectactle.
Two shackled prisoners are pulled out the back of a van, ready to be killed in public.
But seconds later, a single RAF Hellfire missile hits its target - a sniper who had been keeping watch on a roof nearby - and the whole area is sent into chaos.
And the execution is unable to go ahead.