Forensic teams scoured a Plumstead estate at the weekend after a 19-year-old woman was sexually assaulted.
Detectives from the Met's Sexual Offences, Exploitation and Child Abuse Command are investigating an offence that occurred at the bins area in Ann Street, near Villas Road.
The attack on the 19-year-old female victim occurred at around 4am on Sunday (July 13).
There have been no arrests and police enquiries continue.
Any witnesses or anyone with any information that could assist police are asked to contact detectives via 101 or Crimestoppers on 0800 555 111.