A suspected suicide blast during an Ariana Grande concert in Manchester left witnesses stunned Monday night.
Ivo Delgado, who attended the show at Manchester Arena, told NBC News a loud bang occurred after the event had ended and he was waiting in line to leave. Delgado said he then saw smoke, people lying on the floor and someone with a bloody face.
"People started screaming and going to the other side of the arena," he added.
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"It was chaotic," attendee Catherine Macfarlane said. "Everybody was running and screaming and just trying to get out."