Child militants kill Syrian soldiers in sick new ISIS video

The Islamic State's child killers have executed 25 Syrian government soldiers in the ancient Roman amphitheatre in the city of Palmyra, Syria the group's latest video indicates.

ISIS forces child executioners to brutally shoot dead 25 Syrian soldiers

In a colosseum like execution, the video shows hundreds of men watching as the terrorist group puts on a psychotic performance with young child soldiers marching in sync before they calculatedly execute the soldiers.

The video was reportedly shot back in May when Palmyra was captured by the Islamic group.

According to AFP, around 200 people were killed at the time of the city's capture.

Syria's antiquities director Mamoun Abdelkarim says "using the Roman theatre to execute people proves that these people are against humanity".