Police are investigating a serious sexual assault on a woman in her late teens at The Racecourse, Southwell Road, Mansfield.
The attack happened last night at around 8.30pm.
Enquiries are on-going and a cordon remains in place at the scene.
The victim is currently being supported by police officers.
If anyone knows anything about the incident or saw any suspicious activity in the area please telephone Nottinghamshire Police on 101.