Arrest over teen stabbed to death outside Borough shop
Detectives investigating a fatal stabbing in south-east London have arrested an 18-year-old man on suspicion of perverting the course of justice.
The victim, also 18, was attacked outside a convenience store in Pilgrimage Street in Borough on Friday.
The local MP and Liberal Democrat justice minister Simon Hughes described it as an "awful tragedy".
The victim has not yet been formally identified.
The suspect has been described by police as a dark-skinned black man, short, with short dreadlocked hair, who was wearing a white short-sleeved top, dark trousers and dark footwear.
A post-mortem examination at Greenwich Mortuary on Saturday gave the cause of death as stab wounds.
On Friday, Mr Hughes, MP for Bermondsey and Old Southwark, said: "I call on everyone, particularly young people in Southwark or elsewhere who knew the victim, to restrain themselves from any further action which might make matters even worse."
A witness, who did not want to be named, said the teenager was with a friend and his aunt when he was attacked.
Officers say they are keeping an open mind regarding any motive.