Experts from a Krakow mining academy examined the site in south-western Poland last month using magnetic and gravitation methods.
The head of the team, Janusz Madej, said that “according to our examination, there might be a tunnel there but there is no train there”.
Earlier this year, two explorers told authorities in Walbrzych they located an armoured Nazi train hidden in a secret tunnel in the city.
The Nazis allegedly hid a train with gold in a secret tunnel during the war. Local folklore said an armoured train had been carrying gold from what is now the Polish city of Wroclaw as the Soviet army closed in at the end of the war.
It was said to have gone missing near Ksiaz castle, 3km from Walbrzych.
Earlier this year, Piotr Koper, from Poland, and Andreas Richter, from Germany, told authorities they knew the location of the train.
At a news conference yesterday, Koper questioned the survey methodology and said he still believed the train was there.
Information about the train’s location was reported to have come in a deathbed confession from a person who claimed they had helped to conceal it.
Between 1943 and 1945, the Nazis forced prisoners of war to dig more than 9km of tunnels near Walbrzych that were to be used as factories.