Nas was promoting his new single, which was released on Monday
A concert at London's Brixton Academy was halted after shots were fired as American rapper Nas performed on stage.
Witnesses said a man jumped on stage and fired a weapon during a set by the husband of pop star Kelis.
Police said two bullets, which they believe were fired towards the ceiling, were found at the south London venue.
The concert was stopped immediately after the incident and the premises cleared. No-one was found to have been hurt and no arrests have been made.
A police spokeswoman said officers were called to the academy at 2156 GMT on Monday following reports of shots being fired inside the venue and people running away.
She said: "We believe that two shots were fired towards the ceiling. Two bullets and two casings have been recovered from the scene."
She added that officers from Operation Trident, which deals with gun crime within the black community, would be taking over the investigation.
London Ambulance Service was also called to the venue, police said.
Brixton Academy spokeswoman Louise Kovacs said the venue had been evacuated following consultation with police.
She said there was "a high level of security" at every event.
More than 100 security staff had been working at the show and concert-goers passed through scanning and security checks at the entrance to the venue.
Nas has been touring the UK to promote his double A-side single Just A Moment and No One Else In The Room.
Source http://news.bbc.co.uk/1/hi/uk/4370601.stm
A concert at London's Brixton Academy was halted after shots were fired as American rapper Nas performed on stage.
Witnesses said a man jumped on stage and fired a weapon during a set by the husband of pop star Kelis.
Police said two bullets, which they believe were fired towards the ceiling, were found at the south London venue.
The concert was stopped immediately after the incident and the premises cleared. No-one was found to have been hurt and no arrests have been made.
A police spokeswoman said officers were called to the academy at 2156 GMT on Monday following reports of shots being fired inside the venue and people running away.
She said: "We believe that two shots were fired towards the ceiling. Two bullets and two casings have been recovered from the scene."
She added that officers from Operation Trident, which deals with gun crime within the black community, would be taking over the investigation.
London Ambulance Service was also called to the venue, police said.
Brixton Academy spokeswoman Louise Kovacs said the venue had been evacuated following consultation with police.
She said there was "a high level of security" at every event.
More than 100 security staff had been working at the show and concert-goers passed through scanning and security checks at the entrance to the venue.
Nas has been touring the UK to promote his double A-side single Just A Moment and No One Else In The Room.
Source http://news.bbc.co.uk/1/hi/uk/4370601.stm