Suspicious objects have emerged during a raid on a building in Aldenhoven in the Düren district.
A spokeswoman for the Essen Customs Investigation Office said the find on Tuesday evening was about items that might violate the War Weapons Control Act.
Accordingly, some “substances” had to be destroyed on site.
Aldenhoven - The spokeswoman initially left open what it was all about.
When asked, she did not say why the search was near the Roman Park.