ISIS brutes have released images of grey-haired extremists shooting prisoners - just days after they ordered children to carry out executions.

Pictures show four elderly fanatics dressed in black and aiming handguns at their kneeling victims near the terror group's Syrian stronghold of Raqqa.

Moments later, the bearded jihadis, who have not been identified, shoot all four prisoners in the back of the head.

It comes just days after an ISIS video showed a British boy and four other children executing men in cold blood in the same city.

ISIS brutes have released pictures of grey-haired extremists shooting prisoners - just days after they ordered children to carry out executions

Jones gave birth to JoJo (second right holding weapon) in Kent in 2004 but split from his father shortly afterwards. She then converted to Islam

The grotesque nine-minute video is believed to have been recorded recently and shows the organisation is becoming even more brutal as it retreats into its heartland.

The video shows five boys - so-called Cubs of the Caliphate - believed to be from Britain, Egypt, Turkey, Tunisia and Uzbekistan, wielding handguns and wearing desert camouflage.

One of the youngsters makes a blood-curdling shriek in Arabic and slaps one of the terrified captives on his shaved head before they raise their guns and kill the five men, 'atheist' Kurdish fighters who were captured during a battle.

One of the boys says in Arabic: 'No one can save the Kurds even with the support of America, France, Britain, Germany, the devils in hell.'

He then calls for the takbir and the other boys shout in unison - Allahu Akbar (God is Great) before raising their pistols to the sky and shooting the prisoners. Their bodies are later shown with bullet wounds to the head.

Pictures show four elderly fanatics dressed in black and aiming handguns at their kneeling victims near the terror group's Syrian stronghold of Raqqa

The children copy five older jihadists who execute prisoners in orange jumpsuits and butcher them with knives.

Last night, the Mail On Sunday reported how the father of a young boy taken to Syria by his British mother was left shocked after seeing a video which apparently shows his son executing a captured prisoner.

The distraught man, who has not seen his son for three years, said the boy was 'brainwashed' by his mother, Sally Jones, after being taken by her to join Islamic State.

The 47-year-old mother of two, from Chatham, Kent, was declared one of the world's most wanted terrorists by the UN after she fled to Syria with her youngest son JoJo, then aged 10, in 2013.

Now the father believes it may be his son in a chilling propaganda video released on Friday showing five boys murdering a group of captured Kurdish fighters.

'THE CUBS OF THE CALIPHATE' ISIS is now using an unprecedented number of children – dubbed 'Cubs of the Caliphate' – to launch devastating suicide attacks throughout the region and beyond. Within months of the caliphate being founded, more than a thousand children under the age of 16 had been recruited. Once they are recruited by IS, the children's isolation leaves them utterly under the control of military trainers, who school them in the fundamentals of the most fascistic interpretation of sharia law. In January this year Isa Dare, a five-year-old British boy dubbed 'Jihadi Junior' featured in an ISIS video. He shouted: 'We will kill the kuffar [non-believers]' before ISIS fighters executed several prisoners. His mother, Grace Dare, from Lewisham, south east London, is believed to have taken him to join ISIS Even small children are indoctrinated – from the moment they are able to recite the Koran – into believing that the most honourable act they can perform is to die in the name of the self-declared ISIS leader, Caliph Abu Bakr al-Baghdadi. In the training camps, these children are fed a constant diet of DVDs of jihadi operations against 'infidels', which cultivates a murderous hatred of everyone but extremist Sunni Muslims. They are forbidden access via the internet and satellite television to the outside world. Advertisement

Last night the man, who has asked not to be named to protect his safety, said: 'He was brilliant, just a normal boy – always chasing bugs, going down the park. I have had to block it out. It's been hard, we just have to carry on. It's disgusting he's been brainwashed.'

Jones gave birth to JoJo in Kent in 2004 but split from his father shortly afterwards. She then converted to Islam.

After their split, Jones married an Islamic radical 25 years her junior, changed JoJo's name to Hamza, and the three of them fled to Syria.