The site in Borlänge was cordoned off during the night and the police conducted a technical investigation on Tuesday morning.
The roadblocks could be lifted at lunchtime.
- We have been on the scene and carried out a technical investigation and there is a suspicion of a serious crime, says Gabriel Henning, press spokesperson at the police Region Bergslagen.
Later on Tuesday evening, the police were informed that this was a serious rape.
- No one is deprived of their liberty, says Stefan Wickberg.
During the morning, there has been a lot of activity from the police in the area.