Thamshavnbanen sabotage

The Thamshavn Line sabotage was a series of sabotages against the railway Thamshavn Line in Orkdal, Norway during World War II. There were four separate sabotages, all performed by Company Linge in an attempt by the Norwegian resistance to prevent Germany from getting the pyrites that were being extracted at the mine at Løkken Verk.

The Løkken Mine had been operated since 1654, and in 1908 it was modernised with electric pumping and Norway's first electric railway that connected the mine to the port at Thamshavn 25 km away. After the German invasion in 1940 German forces secured control over the mine, but let the operating company Orkla Gruber-Aktieselskab (that since has developed into the Forbes 500-company Orkla Group) continue extraction, since most of the export had been going to Germany anyway. The company obliged, since they saw no advantage in disobeying, which would only have resulted in the German forces themselves taking over the operation of the mine.

The Norwegian government-in-exile decided that it was important to stop the Germans from obtaining copper and sulfur from the mines and the smelters at Thamshavn (now Elkem Thamshavn) and initially suggested bombing both Løkken Verk and Thamshavn. The resistance protested, and felt that by using sabotage the civilian losses could be minimised. It was decided to attempt to stop the mining through targeted sabotage on key infrastructure along the railway.

...
Wikipedia