The meat, 280 kilograms of which was seized, was also contaminated with human faecal bacteria, a spokesperson for the judiciary confirmed.
The food was found in the canteens of the Office of Criminal Investigation and the Office for Statistics in Düsseldorf, reports Der Westen.
A spokesperson for the state prosecutor explained that the total amount of suspect meat they were investigating was 3,000kg.
“The meat should have been disposed of,” said the spokesman. But on the way to disposal it went missing, and was in all likelihood then consumed.
Several companies have been identified by the prosecutors as being involved in the scandal, including an animal food manufacturer, a meat processor in Duisburg, a butcher in Düsseldorf, and the canteens themselves.
According to a statement by the judiciary spokesperson, the Düsseldorf butcher bought the meat from the animal food manufacturer.
The companies under investigation are likely to face fines, but could also be subject to court proceedings.