Regensburg (dpa / lby) - The police checked guests of a Regensburg nightclub during an operation against drug crime. There were 25 criminal proceedings. Initially, several people were arrested on Saturday night who are suspected of having traded or possessed drugs, the police said. Afterwards, guests in and around the club were checked. Four apartments were also searched. Narcotics were seized. The exact amounts were initially unknown. The suspects were released after all criminal procedural and police measures had been completed.