BERLIN — (CNN) Could two treasure hunters have found a legendary Nazi train packed with gold that vanished 70 years ago? It’s a question authorities in Poland’s mountainous southwestern Walbrzych district are taking seriously.

The train reputedly went missing in 1945 at the end of World War II, when the Soviet Red Army was closing in on the forces of Nazi Germany.

As legend has it, it left Wroclaw, then part of Germany and known as Breslau, for Walbrzych — but never reached its destination.

Now two people, a German and a Pole, say they have found a 150-meter long (492 feet) train that they claim contains Nazi treasure that could be worth “well over a million dollars,” said Marika Tokarska, an official at Walbrzych district council.

Through a local law firm, they contacted the Walbrzych district council with news of their find a week ago.

However, they won’t reveal the location of the train until they are given a guarantee that they will be awarded 10% of the value of the treasure inside, she told CNN.

One of the two has a background in excavation projects and has equipment that can detect objects beneath the surface of the Earth, Tokarska said.

Gold and bombs

It’s thought the ghost train could be in one of many railway tunnels built in the area around Walbrzych, near the border with Czech Republic, during World War II and sealed off at the end of the conflict.

Authorities are taking the pair’s claim so seriously that the leader of Walbrzych district council has already met with the heads of the local military, police and fire service, as well as the prosecutor’s office, to discuss their next steps, said Tokarska.

Authorities say that before they can make any guarantees, they need to know where the train is and what’s inside it.

As a military train, it is sure to contain weapons, potentially including unexploded bombs and, according to local authorities, there is even the possibility that it could be carrying early Nazi research into nuclear technology.

To add to the potential risk, if the train has been sealed into an underground tunnel then methane could have built up, creating the risk of an explosion if it’s disturbed by excavators.

Once the authorities know the location, they’ll secure it and make sure investigations are carried out in the safest possible manner, said Tokarska.

If the treasure hunters’ claim should prove to be true, a decades-old mystery will have been solved.

And if they get the 10% share they have demanded, they stand to profit handsomely from their discovery.

Local media outlets are reporting that the train could hold up to 300 tons of gold.

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