The Met said both the victims were known to the police A post-mortem examination is to be carried out on a 16-year-old boy shot dead in east London.
The boy, locally named as Samuel Adelagun, was shot in the upper left chest early on Saturday and died at the scene in Chesterton Road, Plaistow.
Officers think two balaclava-clad gunmen opened fire on a group of four youths, aged 15 and 16, from behind.
Police also found a boy of 15 who was shot in the abdomen, and is in a stable condition in hospital.
No-one has yet been arrested.
The Metropolitan Police said 16 teenagers had been killed in London this year. Five of them were shot.
Police say both the victims of the Plaistow shooting, which happened at about 0320 BST, were known to them.
Detectives from the Met’s Trident unit, which tackles gun-related crime within the black community, are investigating the death.
The shooting took place in parkland at the junction of Upper Road and Chesterton Road.
People have left tributes to Samuel at the scene It is not known if the suspects arrived or departed from the area in a vehicle, but the gunmen were dressed in black and wore balaclavas, police said.
Det Ch Insp John Mackenzie said: “A number of shots were discharged and the youths dispersed.
“They then got together again outside Chesterton Road.”
He said the teenagers had knocked at a house whose owners “provided some shelter as Good Samaritans”.
“The mother [of the deceased] is very distraught as you would expect. It is a traumatic and violent way for a loved one to go.”
Tributes have been left at the scene by several people. One read: “To Sammy, one of the realist young bucks. Gone but never forgotten. 100% love. Liam.”
Another message read: “RIP Sammy. Realist soldier. GBNEF.”
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