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Security services were last night probing whether a ‘British’ boy seen carrying out an apparent execution for Islamic State is the young son of punk-rocker-turned-jihadi Sally Jones.

Anti-terror cops are looking at whether the light-skinned boy, dubbed Abu Abdullah Al-Britani on a sickening video, is 11-year-old son of Kent mum-of-two Jones, who fled to Syria to fight for ISIS in 2013.

Jones has since made numerous online threats towards the West and is said to be a major recruiter of women jihadis.

She took son 'Jojo' with her when she fled the UK and is said to have renamed him 'Hamza'.

During the gruesome propaganda clip a row of men kneel with young uniformed ‘soldiers’ standing behind them with guns. They are believed to be somewhere in Raqqa, Syria, one of the few remaining IS strong-holds.

The youths make statements in Arabic before raising their handguns and apparently shooting the men in front of them in the back of the head.

All the men in orange jumpsuits are Kurds, the boys say, who are apparently being ‘punished’ for recent Kurdish advances in Syria and Iraq.

The horrific footage is part of a longer nine minute propaganda clip posted by the terrorist organisation that features a number of other killings.

The video claims the other children are from Egyptian, Kurdish, Tunisian and Uzbek backgrounds.

Other Brits who have used the ‘al-Britani’ title include Assad Uzzaman, originally from Portsmouth, who was 25 when he was killed in Syria last year.

Abu Rahin Aziz, 32, from Luton fled to Syria after he stabbed a football fan in the eye with a pen.

He was reportedly killed in an American drone strike.

William Hasmo Clinic, who as well went by the pseudonym, also died fighting for IS.

The jihadist - who was feared to be one of The Beatles militants behind US journalist James Foley’s killing - had previously claimed Allah makes beheading victims “easy”.