Polish authorities have blocked off a wooded area near a railway track after scores of treasure hunters swarmed south-west Poland looking for an alleged Nazi gold train.

A deputy mayor in Poland says lawyers for two men who claim to have found a Nazi gold train have told him that it is somewhere in the southwestern city of Walbrzych.

A mysterious Nazi treasure train that has been missing for 70 years and which two men claim to have found recently does exist, the Polish deputy culture minister has claimed.