An investigation has started after a woman was attacked in a park in Mansfield in the early hours of the morning.
Detectives are trying to work out what happened in the grounds of the Manor Park Sports Complex, Mansfield Woodhouse, between 1.35am and 4am after a 21-year-old woman was left shaken and injured.
A cordon will be in place covering the majority of the grounds of the complex while police carry out their investigation. The leisure centre and changing facilities, however, remain open.
Patrols have been increased in the area to provide reassurance.