Police continue to appeal for witnesses and information following a serious sexual assault on a woman in Lambeth, which has now been linked to a second offence.
Detectives from the Met's Sexual Offences, Exploitation and Child Abuse Command are leading the investigation.
At 02:00hrs on 26 June, a 27-year-old woman was sexually assaulted by a man on Klea Avenue, Clapham.
The woman was approached from behind by a man who pushed her into the communal area of flats at the location before attacking her.
The woman managed to scratch him on the face with her key - close to his left eye - before he made off.
This offence has now been linked to an incident in Clapham Common South Side on 22 May at about 02:00hrs when another woman was sexually assaulted.
The woman was followed into the communal hallway of a residential building by a man who then attacked her. The woman fought the male off and he ran from the scene.
The suspect is described as an Asian man, around 25 to 35 years old, of medium build, 5ft 5ins in height with short black hair. He spoke with an English accent.
A man was captured on CCTV near to both incidents, and police would urgently like to speak to him.
Detective Inspector Andrew Wadey from the Met's Sexual Offences, Exploitation and Child Abuse Command said:
"These incidents were terrifying assaults on lone women in the Clapham area. We are appealing for the public's help - it is vital to our investigation that the man in the images is identified."
There has been no arrest and enquiries continue.
Anyone who can identify the man shown in the CCTV stills, or who has information that may assist police, is asked to contact Detective Constable Richard MacKenzie on 020 8721 4251 or call Crimestoppers anonymously on 0800 555 111.