The victim died four days after the incident
A 16-year-old boy has been arrested over the murder of a teenager who was shot in north London.
Sharmaarke Hassan, 17, was found with a gunshot wound to the head in Gilbeys Yard, Camden, at about 2300 BST on Saturday.
The teenager, from Camden, who had drug convictions, died in hospital from his injuries on Wednesday night.
The 17-year-old is the 15th teenager to be killed in London since the start of the year.
Sharmaarke was found guilty of possessing cannabis and offering to supply the drugs last month, the Crown Prosecution Service said.
He was given a one-year community punishment order and ordered to do 40 hours of community service following the conviction.
Police believe Sharmaarke was a member of The Money Squad, one of a number of Somali gangs in the area, but have said they are keeping an open mind about the motive for the killing.
The CPS said Sharmaarke had convictions for breaching the terms of an Anti-Social Behaviour Order (Asbo) banning alleged gang members from Camden, and for stealing a £2,000 Cartier watch.
The Asbo was imposed on 2 November and banned the teenager from Buck Street in Camden, less than half a mile from where he was shot.
Sharmaarke broke the Asbo the day after receiving it.
A post-mortem examination gave the cause of his death as a gunshot wound to the head.
The arrested teenager is in custody at a north London police station.