More than 300 officers from police departments in Hesse, North Rhine-Westphalia and Baden-Württemberg carried out a coordinated operation on 23 March 2022, under the direction of Freiburg police. Local police forces and tax investigators also assisted with the raids.
The raids took place after 30 search warrants were issued.
It was reported that a number of key pieces of evidence had been seized, including manipulated slot machines and amusements machines.
Investigations are being conducted into individuals thought to be associated with the raids, who are under suspicion of providing illegal gambling services. These investigations are ongoing.
Last year a German police officer was one of several people arrested after 41 houses in Saarland were raided following suspicions of illegal gambling and commercial fraud.