The apparent discovery in Poland of a Nazi train thought to be packed with looted treasures could be the first of many, experts have said, suggesting just a fraction of Hitler's tunnel complex has so far been discovered.
Walbrzych in western Poland has been gripped by the decades-old mystery of missing Nazi gold since officials said last week they were "99 per cent certain" that a hidden train has been discovered by treasure hunters.
Piotr Zuchowski, head of conservation at Poland's Culture Ministry, said: "The train is 100m long and is protected. The fact that it is armoured indicates it has a special cargo. We do not know what is inside the train. Probably military equipment but also possibly jewellery, works of art and archive documents."
Specialists at Ksiaz castle, the nearby fortress which Hitler intended to become his base of operations in Eastern Europe, believe there are at least two further undiscovered Nazi trains in the area.
Magdalena Woch, director of culture at Ksiaz castle, said: "There is a story that in 1945 there were three trains which came into the town and have never been found.