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The 20-stone ‘Bulldozer’ emerged as one of the extremist organisation’s ‘pin-up’ fighters last October when he cut off a terrified teenager's hand and foot with a meat cleaver. He has been filmed carrying out a string of gruesome acts in front of crowds of onlookers in ISIS territory.

PH The huge ISIS executioner is known as 'The Bulldozer'

Now, shocking new footage has appeared showing the feared killer topless and lying dishevelled in the back of a pick-up with his hands tied behind his back. The vehicle is surrounded by armed men before it speeds off. Experts now fear ISIS could replace the killer with someone just as violent.

ISIS fighters Fri, March 25, 2016 Iraq and Syrian jihadists, including the Paris and Brussels attacks suspects. Play slideshow PH 1 of 47 Belgian national Salah Abdeslam who masterminded the Paris attacks

The giant fanatic, whose real identity and nationality is unknown, is a celebrity figure amongst the hate group and carries a giant machine gun so heavy it usually has to be mounted on a pick-up truck. Alongside British executioner Jihadi John - real name Mohammed Emwazi - he is one of ISIS' most prized propaganda assets and has featured in a number of videos produced by the group.

PH 'The Bulldozer' executing a teenage boy in Mosul

PH His capture by the Syrian army was caught on camera