Two teenage boys have been arrested on suspicion of murder following the fatal stabbing of a 16-year-old at a party.
The pair, both 17, were arrested at separate addresses in east London on Saturday, after Munashe Charles Kutyauripo, known as Charlie, was killed last weekend.
He was attacked at Ashton playing fields in Woodford, east London, where he had been attending a female friend's 16th birthday party.
Detectives are still hunting for a third teenager, Aaron Alexander Tavares-Gaiete, 16, who they say is being treated as a suspect.
Detective Chief Inspector Mark Lawson, of the Met's Homicide and Major Crime Command, said: "Aaron has not been seen since the murder and I am appealing directly to his friends, if you are helping him by giving him somewhere to stay, lending him money or letting him use your Oyster card please do not stay silent any longer, get in touch with us and help us to find him.
"My direct message to Aaron is - while you have the opportunity please get in touch with us or come into a police station. We need to talk to you."
Emergency services were called at around 9.40pm on January 9, after a confrontation took place outside a social club on the playing fields.
Charlie was then stabbed in the chest and the suspect ran away in the direction of Woodford.
He was tended to by a number of revellers while they waited for help to arrive, but died at 10.45pm at Whipps Cross Hospital
Yesterday, Charlie's family issued a heartfelt plea to anyone with information about the attack to come forward.
They said in a statement: "We hope that if anybody knows anything, they should come forward and help find whoever did this because to the world he was just a 16-year-old boy, but to us, that was our son taken."
It is the first murder of a teenager in London this year. Nineteen teenagers were murdered in London in 2015, of whom 15 were stabbed to death.
Tavares-Gaiete is described as black, 5ft 10ins tall, of slim build with facial hair. He was last seen wearing a dark hooded jacket with a yellow motif on the left sleeve, dark coloured trousers and trainers. He was also carrying a distinctive black "man bag" with a white Nike logo.
Anyone with any information is asked to contact police or Crimestoppers anonymously on 0800 555 111.