DEUTSCHNEUDORF, Germany (CNN) -- Digging has resumed at a site in the southeastern German town of Deutschneudorf, where treasure hunters believe there are almost 2 tons of Nazi gold and possibly clues to the whereabouts of the legendary Amber Room, a prize taken from a Russian castle during World War II. Treasure hunters use modern technology to try to locate the lost Nazi gold. Heinz Peter Haustein, one of the two treasure hunters and a member of Germany's parliament, said: "We have already hit a hollow area under the surface, it's filled with water and we are not sure if it is the cave we are looking for."
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Digging in search of lost Nazi gold resumed on Tuesday
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Treasure hunters think 2 tons of treasure could be buried in mountainside
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Men behind mission battle doubts: "What if we find nothing again?"
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If they do find the treasure, Haustein says, it would legally belong to Germany, although he would recommend that Germany give any Amber Room parts back to @placeholder.