Police are investigating a report of a serious sexual assault on a 15-year-old girl in Crow Nest Park.
The incident is alleged to have happened between 10pm and midnight last night (Friday).
A police spokesman said: “A scene is in place and enquiries are ongoing.”
Police have also been at a second scene near Carr Lane, Dewsbury Moor.
Rumours on social media suggested a body had been found in the park but police stressed they were a looking into a report of a serious sexual assault.