The police were alerted to the incident at 20.32 on Monday evening.
A major effort is underway at 10 pm in central Sandviken, where several police cars and ambulances are on the scene.
- We suspect a serious violent crime, but it is early in the investigation and I can not go into any details, says Tobias Ahlén, press spokesperson at RLC in the Central region.
A man has been taken to hospital with unclear injuries.
Has this happened indoors or outdoors?
- I can not comment on it at the moment.
We still have an ongoing effort, says Ahlén.
No person is currently detained.
- We are doing a number of different investigative measures right now, but I can not go into more on what, he says.