A man exposed himself to a teenage girl in Ilkeston at the weekend.
A 17-year-old was walking on the path running under Chalons Way when she was flashed at by the man.
The teen described him as white, around 5 foot ten, wearing grey jogging bottoms, a black Superdry jacket and a wooly hat.
The incident took place on Saturday, January 24 at around 4.30pm.
Contact Derbyshire Police with information on 101.