The victim has been in contact with the police and she has also been examined in hospital, the police write.
During Friday, the police investigated the crime scene and a crime detection dog was used to search for traces.
No suspect arrested
According to All of Gotland no suspect has been arrested yet. The cordon that was previously set up at the site must have been lifted at 6pm on Friday.
Police wish to get in touch with people who may have information about the incident.