Met Police have released an image of a man as part of investigations into two serious sexual assaults in north-east London.
In the first incident on July 1, a 35-year-old woman was walking home in Newham when she was approached from behind and raped.
The man also stole from the victim.
The second incident on July 6 took place in Waltham Forest, when a 31-year-old woman was raped and robbed.
Police are treating the attacks as linked, and would like to speak to the man captured on a bus camera shortly before the first incident.
Detective Superintendent Andrew Packer said: “These incidents have been deeply traumatic for the victims, who are being supported by specialist officers.”
“In addition to a dedicated investigation team we have extra patrols in the area to provide reassurance and these officers are actively seeking to arrest this suspect.”
He has urged women to “not hesitate” in calling 999 if they feel unsafe.
“I would advise any women walking alone at night to remain vigilant, to be mindful of their surroundings, and to keep family and friends informed of where they may be going,” he said.
“If you see anything you think is suspicious, do not hesitate - call 999 immediately.”
Anyone who can identify the man is asked to call the investigation team on 07881 330951.