The Nov. 15 ceremony at the O2 Arena was scrapped 90 minutes into it when a massive brawl erupted, forcing police to seal off the venue and keep 300 people inside until the early hours of the next day. The ceremony took place in the arena’s accompanying IndigO2 auditorium.

Newspaper reports have questioned the level of security and asked how people were allowed to bring weapons to the venue.

Eyewitnesses spoke of seeing “blood all over the floor” and “chairs, champagne bottles and broken glass flying through the air.”

Intensify Youth, a project aimed at combating knife crime, was just about to present an award when a fight broke out among around 30 people. Other guests were forced to take cover under tables.

“Our man was just about to go on stage and present the award when this happened,” Intensify Youth’s Mike Muller told The Independent.

“The irony is Intensify Youth is a project that aims to combat knife crimes so this is really disappointing. I was on the table right next to where it happened – it was confusion, hysteria.”

London Ambulance Service said three patients were treated at the scene and taken to London hospitals. Police confirmed that one man was arrested, who is reportedly out on bail.

Estelle, Adele, , Dizzee Rascal and Duffy were among the performers nominated for awards.

The O2 released a statement saying venue staff will review the details of the incident and any lessons that can be learned.

“We have a full-time, on-site Met Police team alongside our security teams to ensure customer safety, which is paramount,” the statement reads. “This is the first incident of this nature to have taken place.”