A teenage boy who was stabbed to death in north-east London has been named by police.
Bubacar Jabbie Dukureh, 17, was attacked in Walthamstow last Friday.
He was found suffering knife wounds after police were called to Westbury Road at around 9.20pm.
Despite the best efforts of paramedics, Bubacar Jabbie was pronounced dead at the scene just before 10pm, police said.
A post-mortem exam held on Tuesday established cause of death as a stab wound to the chest
So far there have been no arrests.
Detective Inspector Joanna Yorke, of the Metropolitan Police, said: "Our enquiries continue at pace following the senseless and violent death of another teenager on the streets of London.
“Since Friday, our team has been working to establish the full circumstances around the incident. At this time we are retaining an open mind around motive.
“If you saw or heard anything suspicious or were in the area at the time, no matter how insignificant it might seem, it is imperative that you contact us, or make the call anonymously via Crimestoppers.”
Detective Superintendent Paul Whiteman said: “The loss of yet another teenage life to knife related crime is a tragedy and the investigation team is working relentlessly to find answers for Bubacar’s family.
“The Met is committed to listening to communities and acting on their concerns.
“Violence suppression is our priority and I would encourage community members to make contact with local officers or Crimestoppers if they have information which could either assist this investigation or help save lives.”
Anyone with information is asked to call 101 or tweet @MetCC quoting CAD 8357/23Oct.