A sixteen-year-old boy was stabbed to death in broad daylight in Walthamstow on Friday afternoon.
Police, paramedics and the air ambulance were called to the knifing on Markhouse Road shortly after 4pm and found a sixteen-year-old boy suffering from a stab wound.
Despite their best efforts, he was pronounced dead at the scene half-an-hour later.
A murder probe has now been launched.
The youngster’s next-of-kin have been informed and a post-mortem is set to take place, said police.
There have not yet been any arrests.
Chief Superintendent Simon Crick, the top officer in the borough, said: “ I am totally devastated at the loss of a young man’s life on our streets.
“My deepest sympathy and thoughts are with the victim’s family at this tragic time.
“I, like many others, care passionately about our communities and I know this awful loss of life will reverberate far and wide.
“We must stand together in the face of such violence and I urge anyone who knows anything about what happened this afternoon to contact us immediately.”
Extensive cordons remain in place around the area as well as road closures from the Lea Bridge.
Local MP Stella Creasy said she was “totally devastated” by the news, and asked local residents to come forward with any information that may be helpful to the police.
Anyone with information or footage who has not yet spoken with police is being asked to call 101 or Tweet @MetCC quoting 4965/5MAY.