Dig begins for Nazi gold train - but scientists say it's not there

Explorers in Poland have begun digging for a supposed Nazi train laden with treasure and armaments, undeterred by decades of fruitless searches and a scientific determination that no train is even there.

The search in south-eastern Poland follows a local legend claiming a Nazi "gold" train disappeared in a mountain tunnel as the Germans escaped the advancing Soviet army at the end of the Second World War.