A 19-year-old shot dead in Lower Edmonton last night has been named by police as Mohammed Hussein.
A post-mortem is due to take place in Haringey. No arrest has been made, and police are appealing for witnesses.
Det Ch Insp John Sandlin said: "I am appealing for anyone who was in the vicinity of Bounces Road or Walbrook House at 2145 hrs to help us with our investigation. Likewise if you have any information - no matter how small that can help identify those responsible please come forward and assist us."
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Tributes have been left in Caledonian Road in Islington where 15-year-old Alan Cartwright died after he was stabbed.
A boy has died after he and his friends were attacked while cycling in north London.
Three police officers have been praised for their actions in helping a four-year-old boy who had become stuck on a roof in Newham.