That means secret weapons depot.

Secret Weapons Depot Discovered Near Berlin – According to reports from WDR, NDR, and SZ, security authorities have discovered a hideout containing two loaded weapons on the outskirts of Berlin. Authorities believe it was a depot used by Russian agents for potential attacks.

It must have been like a scene from a spy thriller when German officials made an explosive discovery in late summer of last year in a wooded area on the state border between Brandenburg and Berlin. According to reports from WDR, NDR, and the Süddeutsche Zeitung (SZ), they found a professionally constructed hideout containing two loaded firearms in the capital’s affluent suburban belt.