A man has been arrested on suspicion of murdering MMA champion Jahreau Shepherd at his 30th birthday party in Kennington last week.
Met Police confirmed an 18-year-old was arrested on July 16 on suspicion of murder and attempted murder.
Police were called shortly after 10pm on Saturday, 11 July, to a man stabbed on the Black Prince Estate in Kennington.
Officers attended along with London Ambulance Service and found a man suffering stab injuries. Despite the efforts of officers and paramedics, the man was pronounced dead at the scene.
A post-mortem examination is due to be held at Greenwich Mortuary on Monday, 13 July.
A short time later, a 26-year-old man presented himself at hospital suffering stab injuries, believed to have been sustained in the same incident. These have been assessed as not life-threatening.
On 13 July, a different 18-year-old man was arrested on suspicion of murder; he has been bailed pending further enquiries to a date in mid-August.
Anyone witnesses, or anyone with information is asked to call the incident room on 020 8345 3775 or contact police via @MetCC. To remain anonymous, please contact the independent charity Crimestoppers on 0800 555 111.