- The letter was found behind a wall by builders in town of Nowe Skalmierzyce
- During WWII the central Poland town, was encompassed in Hitler's Third Reich
- Letter was written by Nazi slave workers Jan Karalewski and Wladyslaw Sobanski
A chilling letter written by Nazi slave workers has been found hidden inside a bottle during renovation work at an old railway station in Poland.
The scrawled 'message in a bottle' was uncovered behind a wall by builders in the small town of Nowe Skalmierzyce.
During World War Two, the town in central-western Poland, was encompassed into Hitler's Third Reich.
'Whoever finds this piece of paper will remember Hitler's war against humanity, like when the Teutons expelled people.'
Teutons was a reference to the Teutonic Knights and used as slang during WWII to refer to German soldiers.
Following Nazi Germany's invasion of Poland in 1939, the use of slave labour took on an unprecedented scale.
Around 12 million people from 20 European countries, two thirds of whom came from Central and Eastern Europe, were forced into horrific work conditions, with many dying from extreme mistreatment, severe malnutrition, and torture.
In the town of Nowe Skalmierzyce where the letter was found, a Polish labour camp was set up along with a Nazi transit camp where half of the town's population and surrounding areas were sent.
Most were shipped off to Dachau death camp in Germany. The rest did not survive.
The mayor of Nowe Skalmierzyce, Jerzy Lukasz Walczak, posted a photo of the letter on social media, saying: 'Letters in bottles don't only float in the seas.
'And they don't only appear in movies or in the pages of books ... Life also sometimes writes incredible stories.
'79 years ago, a small note in a bottle was laid, which was discovered yesterday by employees who were renovating the waiting room at our station.
'The object was walled up, so the glass was damaged when being removed, but the message can still be read.'
The letter identified the men as Jan Karalewski, born 27 January 1902, and Wladyslaw Sobanski, born 13 May 1900.
City officials have now launched a hunt for the men's families.