Someone hunts trains after dark. A series of sabotages on the tracks and an investigation that disappeared after 3 days

On the railway line connecting Oslo to Stockholm and Goeteborg there have been a series of dangerous incidents, which Norwegian media already describe as intentional sabotage. The Bane Nor infrastructure operator warns that massive steel elements and boulders were laid on the tracks at night, which damaged trains and could lead to disaster. However, after 3 days the police dismissed the investigation, stating that "there is no way to identify the perpetrator".