Isis supporters are circulating images of a child they say has become the youngest foreign fighter to be killed in battle for the jihadist group, according a counter-extremism think tank.

The images, which cannot be independently verified, show a young boy believed to be about 10-years-old holding guns, posing with a balaclava stretched across his face and standing alongside a man thought to be his father who is reportedly a militant.

Those sharing the pictures are paying tribute to the child on Twitter as the youngest martyr from the Arabian Peninsula to have been killed in Syria as Isis tries to establish a caliphate across swathes of the region, according to Charlie Cooper, a researcher at the Quilliam Foundation.

Mr Cooper told The Independent the images have been circulated on social media with hashtags translated as ‘martyrdom of the cub of Baghdadi and his father'. It is claimed that reports of his death first emerged on 26 September and that he was killed fighting alongside his father.

The child’s alleged death comes after an Australian man fighting for Isis posted a picture online showing his young son holding the severed head of a Syrian soldier in August, with the caption: "That’s my boy."

Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Show all 22 1 /22 Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Syria-Turkey border Mourners gathered to bury three Kurdish fighters from Kobani Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Syria-Turkey border An explosion rocks the Syrian city of Kobani during a reported suicide car bomb attack by Isis Getty Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Syria-Turkey border The US and Turkey have stepped up support for Kurdish fighters defending Kobani against Isis but it is still feared the town may fall; above, observers watch the fighting from a nearby village AFP Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Syria-Turkey border People are silhouetted on the top of a hill close to the border line between Turkey and Syria near Mursitpinar bordergate as they watch the U.S led airstrikes over ther Syrian town of Kobani Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Syria-Turkey border Syrian Kurd Kiymet Ergun (56) gestures, in Mursitpinar on the outskirts of Suruc, at the Turkey-Syria border, as thick smoke rises following an airstrike by the US-led coalition in Kobani, as fighting continued between Syrian Kurds and the militants of Isis group Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Syria-Turkey border Kurdish Rabia Ali (R) accompanied by her son Ali Mehmud (L) mourn at the grave of her son Seydo Mehmud 'Curo', a Kurdish fighter, who was killed in the fighting with the militants of the Islamic State group in Kobani, and was buried at a cemetery in Suruc, on the Turkey-Syria border Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Syria-Turkey border Mourners gather for the funeral of two Syrian Kurdish fighters killed in fighting with militants of the Isis group in Kobani at a cemetery in Suruc Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Syria-Turkey border Kurdish refugees fleeing Kobani enter Turkey at Suruc Getty Images Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Syria-Turkey border Smoke from air strikes against Isis in Kobani can be seen from across the border in Mursitpinar, Turkey Getty Images Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Syria-Turkey border Newly arrived Kurdish refugees after crossing into Turkey from the Syrian border town of Kobani Getty Images Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Syria-Turkey border Kurdish refugees cross the border near Kobani Getty Images Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Syria-Turkey border Smoke rises from the city centre of Kobani Getty Images Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Syria-Turkey border Isis militants stand next to an Isis flag atop a hill in the Syrian town of Ain al-Arab, known as Kobani by the Kurds, as seen from the Turkish-Syrian border, with Turkish troops in foreground, in the southeastern town of Suruc, Sanliurfa province Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Syria-Turkey border A flag of Isis group is seen atop of a building at the eastern side of the town of Kobani, Syria, where fighting had been intensified between Syrian Kurds and the militants of Isis group Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Syria-Turkey border Militants with the Isis group are seen after placing their group's flag on a hilltop at the eastern side of the town of Kobani Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Syria-Turkey border Smoke rises after an apparent airstrike by allied forces against Isis targets in the west of Kobani where Kurdish fighters try to defend the town, near Suruc district, Sanliurfa, Turkey Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Syria-Turkey border Newly arrived Syrian Kurdish refugees stand at the back of a truck after crossing into Turkey from the Syrian border town Kobani, near the southeastern Turkish town of Suruc in Sanliurfa province Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Syria-Turkey border Turkish forces fire tear gas to disperse Kurds on the outskirts of Suruc, at the Turkey-Syria border, as fighting intensified between Syrian Kurds and the militants of Isis in Kobani Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Syria-Turkey border Kurdish men shout towards Turkish army soldiers, who try to evacuate people from the village of Mursitpinar, on the other side of the Syrian town of Ain al-Arab, known as Kobani by the Kurds, by the Turkish-Syrian border in Sanliurfa province Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Syria-Turkey border Turkish Kurds walk as tanks in the background hold their positions on a hilltop in the outskirts of Suruc, at the Turkey-Syria border, overlooking Kobani in Syria where fighting had ben intensified between Syrian Kurds and the militants of Isis Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Syria-Turkey border Turkish Gendarmerie use tear gas to disperse Kurdish protesters during a demonstration against the Isis, at the Syria-Turkey border near Sanliurfa Isis fighters in Kobani (2014): Civilians flee as militants enter Syria-Turkey border Syria-Turkey border Smoke rises from the Syrian town of Ain al-Arab, on the Turkish-Syrian border in the southeastern town of Suruc, Sanliurfa province

In the same month, a report by the United Nations Human Rights Council found Isis affiliated groups have recruited, trained and used children in active combat roles.

It also found Isis has established training camps to recruit children into armed roles, where they would receive weapons training and religious education. In Raqqa, children as young as ten were being recruited and trained by Isis.

The UN said: “In using children below the age of 15, the group has committed a war crime.”

News of the boy’s alleged death comes as video footage was released showing Isis firing on targets on the besieged Syria-Turkey border town of Kobani.

Video: Earlier this year footage emerged showing armed children

The video has been distributed by the pro-Isis media group Al-A’amaq, who publish clips showing the strategic assets seized by the group and where it is advancing.