A sickening ISIS video showing young children savagely murdering three prisoners in a derelict play park has re-emerged.

In the disgusting footage, first released in 2017, a boy no bigger than a four-year-old can be seen wading through colourful plastic balls before shooting a man in the head with a small pistol.

The same boy - who is dressed in all-black ISIS clothing - is then shown giving the order to an older child to cut off the head of another prisoner.

In the disgusting footage, a boy no bigger than a four-year-old can be seen wading through colourful plastic balls before shooting a man in the head with a small pistol

The young boy is shown firing the small pistol after being handed it by a man dressed all in black

After committing his own murder with the pistol, he is shown raising the gun in the air and screaming 'Allahu akbar'

The same boy - who is dressed in all-black ISIS clothing - is then shown giving the order to an older child to saw off the head of another prisoner

The other boy, who is no bigger than a ten-year-old, kicks the man to the ground before he is killed on the orders of the smaller boy

He is shown slowly dragging his right hand across his throat before the other boy, who is no bigger than a ten-year-old, begins beheading the man with a knife.

After committing his own murder with the pistol, he is shown raising the gun in the air and screaming 'Allahu Akbar'.

The video begins with a shot of a disused children's park, complete with merry-go-round, Ferris wheel and the usual jihadi chanting.

The first murder is committed by a boy who appears no bigger than a seven-year-old.

The first murder is committed by a boy who appears no bigger than a seven-year-old. He is shown picking up a large knife in slow motion before climbing into a merry-go-round

There he walks up to a bound prisoner whose head is resting on a seat. He then beheads the man as blood pours into the children's ride

He is shown picking up a large knife in slow motion before climbing into a merry-go-round.

There he walks up to a bound prisoner whose head is resting on a seat.

He then beheads the man as blood pours into the children's ride.