An entrepreneur inspecting the area of the castle found 300 sacks of human remains inside the enterprise.
According to RIA Novosti, the horrific find was made in the German fortress Stein in the Russian city of Kaliningrad.
It is reported that the new owner of the building immediately informed law enforcement agencies about the terrible discovery.
The Investigative Committee has launched an investigation.
According to preliminary data, the sacks were collected there by a company engaged in archeological excavations at construction sites since 2013.
It is also noted that the Stein Fortress is a military building of the late XIX century.
