A Lincoln man was shoved, pushed and mugged of his mobile phone by a group of men at the weekend.
The incident on Brayford Wharf East was reported to police at 3.52am on June 1.
The 20-year-old victim was approached by a group of four men who assaulted and robbed him of his mobile phone.
The only description of the men was that they were wearing dark clothes and one of them was on a bicycle.
Anyone who might have witnessed the incident, or saw a group of men resembling the one described in the area at the time, are asked to call Lincolnshire Police on 101, quoting incident 95 of June 1.