German prosecutors on Wednesday targeted a major brothel in the western city of Cologne as part of their probe into a suspected ring of human traffickers. “This is a provisional security measure in the investigation proceedings,” a spokesman for the prosecutors based in Dusseldorf said. Pascha, one of Europe’s largest brothels, is to be permitted to continue operations, but the authorities’ move means that “no asset transfer can occur” for a month, the spokesman said. Prosecutors have for months been investigating a human trafficking ring that is alleged to have provided German residence permi…