A fourth teenager has been arrested on suspicion of the murder of a boy at a chicken shop in central London.
Josiph Beker, 17, was stabbed to death outside Edgware Road KFC, Westminster, at about 14:00 BST on 10 September.
A 16-year-old boy was arrested on Sunday in connection with the murder. He remains in custody.
Two 16-year-old boys were charged with murder on Saturday. An 18-year-old arrested over the murder has been bailed pending further inquiries.
A man in his 60s has been stabbed to death in west London.
Emergency services were called to St Mary’s Avenue in Southall at about 18:40 BST on Saturday where they found the man suffering from a stab wound.
He was pronounced dead at the scene and his next of kin have been informed, the Met Police said.
A man in his 30s has been arrested on suspicion of murder and is in hospital under police guard being treated for minor injuries.
According to a witness who gave the injured man first aid, he was stabbed after leaving a pub.
Raj Grover, who lives near to the victim, said he was getting ready to go to his own birthday party when the man knocked on his front door.
“He was ringing our doorbell,” he told the PA news agency. “He rang the bell and I went out, my son was there, he was shouting ‘Dad, come out’.
“I went downstairs and saw he was full of blood, and then I was running to pick up a towel.
“I put the towel on and I was pressing to stop the blood, then my wife came out, we called the ambulance and the police.”
Mr Grover, who runs a local business, said the victim asked him to call his wife, who then arrived at the house.
“His wife, she mentioned he went to the pub, I don’t know what happened in the pub just around the corner, he came back, was on his way back and somebody stabbed him twice, stabbed him two times with a knife on the stomach and on his side,” he said.
A crime scene and multiple road closures are in place in the area, Scotland Yard said on Saturday evening.
A 15-year-old girl found dead in the Malaysian jungle after vanishing from a family holiday had starved, a post-mortem has revealed.
Nora Quoirin’s body was discovered beside a stream about 1.6 miles (2.5km) from the jungle resort of Dusun on Tuesday.
Malaysian Police said there was no suspicion of abduction or foul play.
Her body was found following a 10-day search after she disappeared on 4 August.
The teenager died two or three days before she was found, police believe.
Nora was born with holoprosencephaly, a disorder which affects brain development.
Her parents had previously said they didn’t believe she would have wandered off alone and suspected she had been abducted.