A curly-haired man who pulled his trousers down as a woman walked past him near Northampton town centre is being sought by police.
The force is appealing for witnesses to the indecent exposure, which happened at around 10.35am on Friday, March 17.
A woman was walking along Kettering Road towards town when, between Hood Street and Cowper Street, she saw a man stood in a doorway.
The man, who was described as having greasy, curly hair down to his ears, pulled down his trousers and exposed himself to the victim.
Police say the offender was a Middle Eastern man, between 30 and 50 years of age and around 5ft 9 inches tall. He was of medium build, was unshaven and was wearing a black T-shirt and grey jogging bottoms.
Anyone with information can contact Northamptonshire Police on 101, or Crimestoppers anonymously on 0800 555 111.