A horrifying new ISIS propaganda video appears to show a six-year-old child assisting in a double beheading.

The boy, wearing a black headscarf and camouflaged army gear, delivers a speech to camera while holding out two knives.

Executioners then walk past him and each take a knife before beheading their prisoners in Syria.

With the blade balanced in his hands, he asks that the terrorists who butcher the victims are given peace by the Prophet Muhammad and Allah before delivering the chilling line, 'The infidel and his killer never meet in hell'.

Scroll down for video

This boy delivers a speech to camera before handing knives to an ISIS killer in propaganda video

Two prisoners are forced face-down in a stream before ISIS terrorists cut off their heads

The boy hands two knives to the executioners as another follows behind with a prisoner

Two jihadis then walk in front of the young child and each take a knife from his hands.

They can both be seen pushing victims along a path in the rocky countryside.

It is not clear from the video what supposed crimes the prisoners are said to have committed against Islamic State, but both men are wearing matching tracksuit bottoms which are black with orange detail.

After being frogmarched through a stream, they are pushed face down into the water before being beheaded by two terrorists wearing black cloaks and masks.

Their bodies are left in the water as their blood runs downstream.

The video then cuts to another series of sick beheadings carried out by the Khalid Ibn al-Walid Army branch of ISIS.

The boy, pictured here having given his knife to the first ISIS butcher, is the latest youngster the terror group has paraded in its propaganda videos

The video, which was shot in Syria by the Khalid Ibn al-Walid Army branch of ISIS, goes on to feature a series of beheadings

Children are being routinely paraded in the terror group's propaganda videos, with multiple videos showing very young boys shooting prisoners in the head.

In January, a sickening video appearing to show a toddler shooting a prisoner dead in a ball pit in Syria was published online by Islamic State.

In the video, the child is seen walking across a ball pit, full of broken plastic balls, towards a prisoner who is tied to a fence by his wrists.

A man then hands the toddler a gun, and he is seen aiming the gun before seemingly pulling the trigger.

Last year, a chilling video from ISIS showed a British boy and four other children executing prisoners in cold blood in Syria.

The grotesque nine-minute video is believed to have been recorded recently in the ISIS capital of Raqqa in Syria.