Horrific! ISIS militants gun down 200 captive Syrian children

Damascus: Yet another horrific video, showing mass executions by dreaded terror outfit Islamic State of Iraq and Syria (ISIS), has come to the fore.

The video, allegedly uploaded by an anti-ISIS activist based in Yemen, shows around 200 children were gunned down by the jihadists of the terror group.

The footage is believed to be filmed in August 2014 near the Tabqa airbase in Syria.

The video further shows the militants asking the prisoners of war to lie down facing the ground and then indiscriminately firing at them.

More than 250,000 people have been killed since the conflict began in March 2011.

The United Nations is estimating that 13.5 million people in Syria are now in need of humanitarian assistance and some form of protection, including more than six million children.