Detectives in Woodford Green are appealing for witnesses after the body of a man was found close to Broadmead fields.
Detectives believe it is the body of an 18-year-old who may have been killed during an altercation in the early hours of monday morning.
Four men and a woman were arrested at the scene. They're all currently in police custody.
A post-mortem examination will take place tomorrow at Walthamstow mortuary.
Officers are appealing for anyone who saw anything suspicious, in particular a blue Fiat Punto in Courtland Close or activity near the bridge in Chigwell Road (close to the Jet petrol station) from Sunday evening through to Monday night.