Two teenage boys have been bailed by police investigating the murder of a 16-year-old boy at a birthday party.
Munashe Charles Kutyauripo, known as Charlie, was stabbed to death at the Ashton Playing Fields in Woodford on January 9.
Detectives say two teenage boys, both aged 17, were arrested at separate addresses and have since been bailed..
Police say they are still trying to trace Aaron Alexander Tavares-Gaiete who they are treating as a suspect in Charlie's murder.
He is described as black, 5ft 10ins tall, of slim build with facial hair.
When last seen, he was 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.
A post-mortem examination held on Monday at Walthamstow Mortuary and gave cause of death as a stab wound to the chest.
Anyone with any information or knows of Aaron Alexander Tavares-Gaiete's whereabouts are asked to contact the incident room on 020 8358 0200 or Crimestoppers anonymously on 0800 555 111.