A stranger sexually assaulted a woman as she walked along an alleyway in York.
Police have now released details of the attack, which took place between 11pm and 11.30pm on August 13.
A North Yorkshire Police spokesman said: "The victim was walking along an alleyway between Nicholas Street and Milton Street when she was approached by a man unknown to her.
"The man inappropriately touched the woman before she was able to leave the scene."
The man was described as white, around 6ft and of medium build with a grey beard.
He wore a dark blue or black t-shirt and grey tracksuit bottoms, and spoke with a local accent.
Anyone with information which may help the investigation is urged to email email@example.com or call 101, select option 2 and ask for PC Lucy Watson.
Information can also be passed on anonymously via the independent charity Crimestoppers on 0800 555 111.
Please quote reference 12180150883 when providing information.