Detectives have launched a murder investigation after a 17-year-old boy was fatally assaulted at Latimer House on Beaconsfield Road, SE17.
Police and London Ambulance Service were called at 4.20pm on Sunday 30th December following reports of an assault.
The teenager was pronounced dead at the scene. Next of kin have been informed. Formal identification awaits.
A post-mortem examination will be arranged in due course.
Detectives from the Homicide and Serious Crime Command are investigating.
A 17-year-old boy has been arrested on suspicion of murder and a 39-year-old woman has been arrested in connection with the investigation. They remain in custody at a south London police station.