We are appealing for the public’s help to identify this man.
Officers would like to speak with him as they believe he has information about an incident in Drummond Road, in Bristol, on 14 August last year.
The man in the CCTV is black, between 28-35 years old, of slim build, around 5ft 10ins tall, with short, black, hair. He is shown wearing a grey t-shirt and dark shorts.
At around 11.30pm, an unknown man approached the victim, a woman in her 20s, from behind and sexually assaulted her by touching.
Officers are also keen to speak with the man in the light blue t-shirt in the second video (below), who officers believe may have witnessed the incident.