In Pakistan, a suicide bomb blast ripped through a dance celebration at a Sufi Muslim shrine Thursday, killing at least 77 people and wounding hundreds of worshipers in a remote part of the southern Sindh province. Survivors of the bombing described a horrific scene.

Mohammad Ashfaq: “As soon as I entered the shrine, I heard a dreadful sound. The first thought that came to my mind was that this could not be a bomb blast, but then the next thought that came to my mind was that we were dead. It was like doomsday.”

An offshoot of the self-proclaimed Islamic State claimed responsibility for the attack, which was the deadliest single assault in Pakistan in recent years.