Three people have been stabbed during a music awards ceremony in south-east London.
One man was stabbed and two others have been injured during a music awards ceremony in south-east London.
One man was seriously hurt while two others received minor injuries at the Urban Music Awards at the O2 arena.
The Urban Music Awards at the O2 arena in Greenwich had to be abandoned after an hour and a half when violence broke out.
Scotland Yard received reports of the attack shortly after 2210 GMT, and one man has been arrested.
The stabbed man in his late 20s is in a critical condition in hospital. Two other people have been treated in hospital for minor injuries.
Officers initially cleared the room, but the audience were allowed back inside, although it appears the ceremony has been abandoned.
Officers initially cleared the room, but the audience was allowed back in.
The victims have been to taken to hospital, but their injuries are not thought to be life threatening.
Andre Nevling, 24, said a woman sitting at his table was "covered" in blood.
Andre Nevling, 24, said a woman sitting at his table was "covered" in blood.
"Obviously the guy who got stabbed must have run straight past her and she's pretty shaken up," he said.
"Obviously the guy who got stabbed must have run straight past her and she's pretty shaken up," he said.
Mike Muller, 38, from London, said there was a lot of confusion and hysteria.
Mike Muller, 38, from London, said there was a lot of confusion and hysteria.
"The company I work for, Intensify Youth, were presenting an award. Our man was just about to go on stage and present the award when this happened.
Nothing of this nature has ever taken place in the venue before O2 spokeswoman
"The company I work for, Intensify Youth, were presenting an award.
"Our man was just about to go on stage and present the award when this happened.
"The irony is Intensify Youth is a project that aims to combat knife crime so this is really disappointing."
"The irony is Intensify Youth is a project that aims to combat knife crime so this is really disappointing."
Police put a cordon in place outside the arena and guests were questioned before being allowed to leave.
Police put a cordon in place outside the arena and guests were questioned before being allowed to leave.
Celebrity guests
The awards were being held in indigO2, a 2,350 capacity venue inside the O2 Arena.
The awards were held in the indigO2, a 2,350 capacity venue inside the O2 Arena.
Estelle, Adele, Leona Lewis, Dizzee Rascal and Duffy were among the performers nominated for awards, but it is not yet known which celebrities were in attendance.
Estelle, Adele, Leona Lewis, Dizzee Rascal and Duffy were among the performers nominated for awards, but it is not yet known which celebrities were attending.
'Slack security'
Some people at the event said security was poor.
Some people at the event said security was poor.
Natalie Williams, 32, said: "Before anything even happened I commented to my boyfriend, because we live nearby and come here a lot, and we usually get screened coming into the building. Tonight there was nothing."
Natalie Williams, 32, said: "Before anything even happened I commented to my boyfriend, because we live nearby and come here a lot, and we usually get screened coming into the building. Tonight there was nothing."
Chris Miller, who was reviewing the awards for an online music guide, said people were wandering into the press room without a pass.
Chris Miller, who was reviewing the awards for an online music guide, said people were wandering into the press room without a pass.
"Even when we were waiting outside in the press area for stars to arrive, it was a melee," he said.
"Even when we were waiting outside in the press area for stars to arrive, it was a melee," he said.
"The security was so slack."
"The security was so slack."
An O2 spokesperson said: "Nothing of this nature has ever taken place in the venue before and all the usual stringent security measures were in place.
An O2 spokesperson said: "Nothing of this nature has ever taken place in the venue before and all the usual stringent security measures were in place.
"We are working closely with the police to understand how this happened. Our thoughts are with the victims of the attack."
"We are working closely with the police to understand how this happened. Our thoughts are with the victims of the attack."
In 2004, a woman was shot outside the Urban Music Awards when it was held at the Barbican Centre in the City of London.
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Were you at London's O2 Arena when this happened? Send us your story using the form below:
