The alarm came in to the police just before 10 pm on Tuesday.
- We have found an injured person who is conscious.
The person has been able to talk to us, says Åsa Wallentin, press spokesperson at the police.
Police are questioning witnesses at the scene and are looking for suspected perpetrators in the area by both helicopter and ground patrol.
The types of injuries the person has are not generally known.
The site has been cordoned off for technical inspection.