A man has been arrested in connection with the murder of Jodie Chesney.
The 17-year-old was stabbed to death in a random and unprovoked attack as she sat with her boyfriend and three other friends in a park in Harold Hill.
The suspect has been held in Leicester after the teenager was killed on Friday evening.
The Metropolitan Police has said arrangements are being made to transport the man to London.
His name and age have not been revealed by police.
Jodie was playing music with five of her friends in Harold Hill when they were approached by two males, police said.
One of the men stabbed her in the back before the pair fled the scene without saying anything.
Jodie was reportedly cradled by her boyfriend Eddie Coyle while she lay dying as he urged her to ‘please stay awake’.
She became the 18th person to be killed in London this year and the first female victim.
One of her friends, 18-year-old Lucy Elkin, said the attack was ‘unprovoked’.
She said: ‘There’s no justification of any sort for something like this.’
Detective Chief Superintendent Shabnam Chaudhri, who is leading the police investigation, said on Monday afternoon: ‘We still don’t have any idea why Jodie was attacked.’
She said investigators were ‘focusing totally’ on a witness appeal to try and track down the suspects.
— Metropolitan Police (@metpoliceuk) March 5, 2019