Officers are appealing for information following a sexual assault on a 19-year-old woman in Lynn.
The incident took place as the victim walked through Hillington Square at around 3am on Monday. The victim was approached from behind by an unknown male who pulled her to the floor and groped her chest before slapping her across the face.
The woman managed to struggle free and the offender ran off. He was described as white, 5ft 10in tall, of slim build and wearing a blue hooded top, dark trousers and white trainers.
The man is believed to have left the Kudos nightclub and walked through the town with another male before approaching the female at the entrance to Hillington Square.
After the assault he walked along London Road towards the Southgates.
Anyone with information relating to the incident is asked to contact Det Con Emma Cross at Norfolk Constabulary on 101 or Crimestoppers on 0800 555111.