Police would like to hear from anyone who may have information about an incident in Victoria Square, Westport, in the early hours of Saturday 15 September.
The incident is reported to have taken place between the hours of 2am and 5am.
Police are keen to speak to anyone who was in the area at the time, and who may have noticed anything suspicious.
Anyone with information can get in touch with Greymouth Police by calling (03) 768 1600 and mentioning Operation Hun. Information can also be provided anonymously through Crimestoppers on 0800 555 111.
ENDS
Issued by Police Media Centre