A man had his wallet stolen after being struck in the ribs, causing him to fall.
Police are appealing for information about the robbery in West Glebe Park, Corby, at about 11pm on Friday (August 10).
A 21-year-old man was walking through the park alone when he was struck in the ribs and he fell to the floor.
His wallet was then taken from his pocket.
Witnesses to this incident, or anyone with information about it, can call Northamptonshire Police on 101 or information can be given anonymously to Crimestoppers on 0800 555111.