A man was pushed and then punched in the face by an offender who demanded he hand over his car keys.
The incident happened on Rodney Drive, Corby, at about 4.30am on Friday, 4 March.
The victim was walking along the street to get to his car when he was approached by the offender who demanded his car keys. When the victim refused, the offender assaulted him in an attempt to take the keys.
The victim fought back, forcing the offender to flee towards Kingsthorpe Avenue.
The offender is described as white, in his mid-20s and wearing dark clothing.
Anyone with information can contact Northamptonshire police on 101. Alternatively, they can call the independent charity Crimestoppers anonymously on 0800 555 111