A Polish cultural official says he is "convinced" of the existence of a Nazi train that has been missing for 70 years and which two men claim to have found recently.

Deputy Culture Minister Piotr Zuchowski also warned treasure hunters in southwestern Poland on Thursday to stop looking for the "so-called 'gold train,'" saying it could be mined.

In the 70 years since World War II, local Polish legend has said that a German train filled with gold and other valuables went missing around Walbrzych while fleeing the Red Army. This month two men, a Pole and a German, said they found a train with armaments and valuables, leading to hopes it could be that mystery train filled with treasure.

The Culture Ministry plans an announcement on the matter Friday.