Hundreds are dead after a week of some of the worst sectarian violence since the fall of the Assad regime. Subscribe to ABC News on YouTube: https://abcnews.visitlink.me/59aJ1G ABC News Digital is your daily source of breaking national and world news, exclusive interviews and 24/7 live streaming coverage. Download the ABC News app for the latest headlines and alerts: https://abcnews.go.com/devices Watch 24/7 coverage of breaking news and live events on ABC News Live: https://www.youtube.com/