A 42-year-old woman has been sexually assaulted on a Lincoln bus, according to Lincolnshire Police.
The incident took place on the 66A bus from Lincoln Bus Station to Boultham Park Road at approximately 4.45pm on December 27.
The offender touched the woman in an inappropriate manner several times during the journey, and was drunk at the time.
He is described as between his late 50 and early 60s, white, wearing dark clothing, around five foot five inches tall and has short, grey hair.
Police are asking witnesses or anyone with information to come forward by calling them on 101 or Crimestoppers anonymously on 0800 555 111.