precious metals that can only be either gold or silver . The instruments would not have reacted to any other metal like copper . '' See photos from hunt for lost Nazi gold '' Hanisch pointed out that his father , who was a navigator in the Luftwaffe , the Nazi air force , was one of the troops said to have been involved in hiding art , gold and silver as the Nazis realized that they would lose the war . He said that when his father died , he left coordinates leading to the spot in Deutschneudorf . `` It 's not about getting the reward , '' Hanisch said at the site . `` I just want to know if my father was right and if my instincts were right . '' Haustein , who is paying for the expedition , said he hopes that finding the gold could lead to the Amber Room , whose interior is made completely of amber and gold . It was looted by the Nazis from a castle in St. Petersburg , Russia , after Adolf Hitler 's forces invaded the Soviet Union in 1941 . The room looked so majestic
DEUTSCHNEUDORF , Germany -LRB- CNN -RRB- -- 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 . '' Digging was stopped more than a week ago amid safety concerns , as authorities and the treasure hunters feared that the shaft might collapse and that the cave -- if it is there -- may be rigged with explosives or poisonous booby traps . At a news conference Friday , Christian Hanisch , the other treasure hunter , said that geological surveying equipment had located a possible cave about 30 feet under the surface containing ``