At least 60 ambulances were sent to the Manchester Arena following the blast in the foyer of the venue at about 10.30pm.
Ariana Grande had just finished performing and people were attempted to exit the venue when a loud bang was heard.
It was initially described it as a “serious incident,” but officials later said it was “being treated as a terrorist incident until police know otherwise.”
During a news conference early Tuesday, Greater Manchester Chief Constable Ian Hopkins said “this is clearly a very concerning time for everyone.”`
Video from the scene appeared to chaotic scenes as people tried to escape the venue.
Following the incident, a representative for Grande told Billboard that she was “okay.” Grande’s representative did not immediately respond to BuzzFeed News request for comment, but she later tweeted that she was “broken.”
—Alicia Melville-Smith
