Detectives investigating a fatal stabbing in East Dulwich have made an arrest.
The 24-year-old man was arrested on suspicion of murder on Wednesday, 13 February and taken to a south London police station where he remains in custody.
Police were called at approximately 02:35hrs on Sunday, 10 February, to reports of a man stabbed on Lordship Lane, near the junction with East Dulwich Grove, SE22.
Officers and the London Ambulance Service attended.
The victim has been formally identified as 39-year-old Dennis Anderson from Lewisham.
A post-mortem examination held on Tuesday, 12 February gave cause of death as an incised wound to the neck.
Detective Inspector Domenica Catino, from the Met's Homicide and Major Crime Command, who is leading the investigation, said: "Although we have made an arrest, we still need to hear from anyone that may have been in the area on Sunday morning.
"Any information, no matter how insignificant it may seem, could really help our investigation.
"We are aware of speculation around the motive for this attack and can now confirm that the suspect approached Mr Anderson in an off-licence shop before an altercation broke out and the suspect delivered a fatal attack.
"Our top priorities now are to support Mr Anderson's family."
Anyone with information is requested to call police in the incident room on 020 8721 4961.
You can also call Crimestoppers anonymously on 0800 555 111 or tweet police via @MetCC.