ISIS executioners kill 25 Syrian regime soldiers in front of crowds at Palmyra ruin | Daily Mail Online

On a command, the condemned soldiers are killed simultaneously with a shot to the head. 

ISIS captured the historic city on May 21, and has been systematically destroying the city's treasured ancient monuments. 

The group was accused of executing hundreds of people in and around Palmyra since it swept into the city in May, after a lightning advance across the desert from its stronghold in the Euphrates Valley to the east.  

ISIS is known for using children – dubbed ‘caliphate cubs’ – as suicide bombers, soldiers and executioners in their attempts to instill fear across Iraq and Syria.

Authorities fear that the use of children as soldiers and suicide bombers will only increase in the coming months.

ISIS executioners kill 25 Syrian regime soldiers in front of crowds at Palmyra ruin | Daily Mail Online