London's Metropolitan Police has confirmed it is investigating a serious incident at the sixth annual Urban Music Awards.

The awards had to be halted when police were called to the Indigo venue at the O2 in Greenwich at 10.10pm on Nov. 15 after reports of a stabbing; two men were hospitalized, one of them had stab wounds.

"Officers and the London Ambulance Service attended and discovered a man suffering stab wounds," said the Metropolitan Police in a statement. "He was taken to an east London hospital where he remains in a serious but stable condition.

"A second man was also taken to hospital for treatment to minor injuries and discharged a short while later. Detectives from Greenwich CID are investigating."

Police confirmed a 21-year-old man was arrested at the scene and later bailed to return in Jan. 2009 pending further enquiries.

AEG Europe and the O2 issued the following statement after the incident: “The O2 has invested in a permanent, full-time, dedicated on-site Metropolitan Police team. Additionally our own extensive security team works very closely with this team, all divisions of the Metropolitan Police and London Borough of Greenwich to ensure customer safety, which is paramount.

“This is the first incident of this nature to have occurred. All the usual pre-event risk assessment was carried out between The O2, the Metropolitan Police and Greenwich. We have released all images from our extensive CCTV network to the police and are currently sitting down with all parties to review the details of the incident and any lessons that can be learned.”

The awards organizers, Invincible Media Group, said in a statement that part of the show “was suspended due to a separate incident which had nothing to do with the UMAs, [it was] simply a minority who decided to take it upon themselves to try and ruin what was turning out as one of the best ever UMAs.”

As a result, the rest of the awards presentations will be filmed on Nov. 21. The abortive ceremony and this extra segment will be screened Nov. 26 on Flava TV on digital satellite TV.

Winners included Adele for best jazz act, Estelle and Kanye West for best collaboration for “American Boy” (Homeschool/Atlantic) and Leona Lewis for best album (Syco). Other winning acts included Roll Deep, Sway and Tinchy Stryder. Finley Quaye won the lifetime achievement award.

Organizers added that next year’s event will be on Nov. 1 and will be invite-only at a secret location.