In the nine days since the fall of Palmyra (Tadmur), ISIS has rounded up government supporters and carried out mass executions, with the Syrian state media claiming over 400 killed, mostly women and children.
The Syrian Observatory for Human Rights confirmed the basics of the story, affirming it had documented mass executions in the ancient oasis city, but putting the toll at 217.
Among the 217, the monitors said about 150 of them were captured members of the Syrian military seized during the fall of the region, with the rest civilians, including a handful of children.
The fall of Palmyra put ISIS even more deeply in control of central Syria, and has expanded their territory in the country to the point where they are estimated to control over 50% of the nation, by area.