The Turkish invasion began shortly after President Donald Trump announced US troops would be repositioning away from Kurdish forces, who have been US allies in the fight against ISIS.
A Turkish MP from President Recep Tayyip Erdogan's party condemned the execution of unarmed war prisoners on Twitter in response.
It is the dominant force of the Syrian Democratic Forces (SDF), which has partnered with the US to dismantle ISIS' hold in Syria.
Kurdish-held territory in northern Syria has been hit by Turkish airstrikes, freeing some ISIS prisoners in the process.
Other reports and videos have emerged, suggesting that more ISIS prisoners may have escaped among airstrikes in northern Syria, including potentially dangerous combatants, in addition to the women and children.
Kurdish forces guarded ISIS prisoners in the region, but the ability to do so has been greatly impeded by the Turkish invasion.
US forces currently stationed in northern Syria could be caught in the crosshairs, prompting the supposed withdrawal. »