Belgian police raided 26 addresses across the country and detained 25 people on Tuesday as part of an investigation into a gang suspected of trafficking women from China to become sex workers.
Federal prosecutors said the number of Chinese sex workers in Belgium had risen in recent years, notably in Brussels. They believe a criminal organisation brought Chinese women to Europe and forced them to become prostitutes.
Similar raids were also carried out in Barcelona and Alicante in Spain. Belgian investigators want one suspect detained there to be extradited to Belgium.