ISIS has reportedly killed hundreds of people and captured at least 400 in eastern Syria.
There are conflicting reports about the scope of the attack in the Deir ez-Zor region. Local media reported 300 civilians were killed, but a Syrian activist group says around 135 were killed, including 50 pro-Syrian regime fighters.
Reports say those kidnapped are Sunni Muslims, the majority group in Syria.
These recent killings are strategic for ISIS, allowing the group to have a stronger hold in a region of Syria that's high in resources like oil. (Video via Alaan)