A 14-year-old girl has been sexually attacked by a man while walking the West Coast wilderness trail in Greymouth.
She was walking south when she was attacked from behind by an unknown male and sexually violated in an area off the track.
The attack happened in the Blaketown area behind the BMX Park near the aerodrome, police say.
Greymouth Police are wanting to speak with anyone who may be able to help with their enquiries into this incident.
"We’d like to hear from anyone who may have been in this area around that time, particularly anyone who has witnessed a man behaving suspiciously," Police said in a statement.
"We would also like to talk to people who saw a young woman running in the area between the wilderness trail and New World on that evening. She was not wearing running gear and this may have been noticed as odd."
Police are increasing patrols in the area as a result of this awful attack but urge people to remain vigilant.
Police is are taking every step possible in investigating this incident.
Anyone who may have information has been asked to call police on 03 768 2611.