Hundreds of Kurds fleeing villages held by the Islamic State (ISIS) terror organization in northern Syria amid a wave of mass abductions have been shot at, with several killed or wounded, opposition activists and a Kurdish official said Saturday.

As the US marks a year since its first airstrikes against ISIS, the Islamic terror group advanced towards a Syrian town, causing hundreds of Christians to flee.

An ISIS video showed a boy beheading a Syrian soldier under an adult terrorist's supervision. Another showed 25 children unflinchingly shooting 25 captured Syrians.