A woman was inappropriately touched by a man after he made a lewd comment to her as she was walking along Oakley Road in Corby.
The incident happened shortly after 1.30am yesterday (Sunday), opposite the Tesco Express store.
The victim pushed the man away, and he then walked towards Station Road.
The offender is described as white, between 5ft 8in and 5ft 10in.
He was of average build and between 25 to 30 years old.
He had short, tidy spiked blond hair and was clean shaven.
He was wearing a black, long sleeved thin summery jumper and dark coloured bottoms.
Anyone with information can contact police on 101 or Crimestoppers anonymously on 0800 555111.