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.
"It was chaotic," attendee Catherine Macfarlane said. "Everybody was running and screaming and just trying to get out."