A 20-year-old woman had money and her bank card stolen after a man approached her from behind and robbed her in Northampton town centre.
The incident took place in the early hours of the morning in a side street between Bridge Street and The Drapery.
The woman was walking between a car and two men who were standing in the street talking when a car pulled alongside her.
Another man then approached the woman from behind, searched her and took money and a cash card.
Police today released details of the crime which happened between 2.30am and 3.15am on Saturday, April 6.
They are particularly interested in talking to a group of men who were in the area at the time and may have disturbed the offenders.
Witnesses or anyone with information can call Northamptonshire Police on 101.