A woman has died in hospital after being critically injured in a crush at O2 Brixton Academy on Thursday night.
Rebecca Ikumelo, 33, from Newham, was attending a gig by the Nigerian Afrobeat singer and songwriter Asake whose London concert dates sold out within minutes when released in September.
Two other women aged 21 and 23 remain in critical condition.
Chief Superintendent Colin Wingrove, policing commander for Lambeth and Southwark said: “I’d like to extend my sympathies to all those who have been affected. Having seen some of the really upsetting images on social media, our thoughts are with them.
“An urgent investigation is currently under way led by detectives from our Specialist Crime Command and cordons remain in place as officers continue to work at the scene. This is still a fast moving and evolving picture and we are working to establish the events that led up to the incident.
“We are also aware of a vast amount of footage on social media and of course this will be examined as part of the investigation along with footage from officers’ body worn video cameras.
“We are working incredibly closely with our partners and community members and would like to thank them for their support so far in the investigation. We would also like to thank people for coming forward with information.”
Police were called to the venue after receiving reports of a crowd of people attempting to force their way in and social media videos show hundreds of people on the street outside the doors.
The show was stopped 10 minutes after Asake appeared on stage.
A post-mortem examination will be held on Sunday 18 December at Greenwich Public Mortuary.
A police investigation is underway with an online page for submitting photos and videos.
Any witnesses are asked to call 101 giving the reference 6725/15Dec.