London:  Latest footage released by the Islamic State terror group shows a child executing prisoners by a river bank in Iraq during a mass slaughter, a media report said.

In the video, released this week on jihadi forums, the boy fires bullets into the heads of two prisoners. Their lifeless bodies are then pushed into the water by older jihadis, the Mirror online reported.

The video was taken when the terror group conducted a massacre last year which left an estimated 1,700 dead.

The clip is a small part of the 22 minute video in which dozens of Iraqi military cadets are shown being executed.

They were captured at the Speicher military base near Tikrit before being transported and executed at various locations.

Young men are seen falling from trucks and pleading for their lives before being made to get into shallow graves and sprayed with bullets.

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