Residents in the vicinity are urged to stay indoors and a road has been closed off.
Now the police's technicians will examine this object, says the police's press spokesperson Susanna Rinaldo.
According to information to TV4 and Aftonbladet, it is hand grenades that have been found, but Susanna Rinaldo does not want to comment on it.
The alarm about the incident came at 19.30 on Tuesday.
