A man has been charged with the murder of teenager Hani Abou El Kheir in central London.
Ahmed Mikhaimar, 19, of Pimlico, has been remanded in custody to appear at Redbridge Magistrates later.
He is accused of killing 16-year-old Hani, who was stabbed to death in Pimlico - one of London's most affluent areas - on January 27.
The teenager, who lived on the nearby Churchill Gardens estate, was taken to King's College Hospital after the attack but died later.
A post-mortem examination gave the cause of death as multiple stab wounds.
Two other teenagers arrested on suspicion of Hani's murder have been released on bail, while four other people were bailed on Sunday night.
A man aged 48, a woman of 47 and two girls aged 16 and 17, who were arrested on Saturday on suspicion of assisting an offender were bailed to a date in March, Scotland Yard said.
Two boys aged 16 and 17 arrested on suspicion of murder on Saturday have been bailed to dates still to be fixed, while an 18-year-old man arrested on suspicion of murder on Saturday remains in custody.