Officers are appealing for information after a woman in her 40s was sexually assault in Norwich earlier this week.
The incident happened shortly after 11.45am on Wednesday 10 January when the victim was cycling along Chartwell Road and an elderly man approached her.
He pushed himself up against her and touched her inappropriately.
The victim then pushed the suspect away, before cycling home and reporting the incident to the police.
The man is described as being white, aged 70-80 years old, around 5ft 10, of a medium build and having white hair.