Subscribe | UPI Odd Newsletter Subscribe BEIJING, Dec. 30 (UPI) -- Police in China said they arrested 15 people in a prostitution investigation focused on a website offering breastfeeding services for adults. The Ministry of Public Security conducted a joint investigation with police from Beijing, Hebei, Hubei and Jiangxi to bust 15 people connected to "The Wet Nurse Forum," a website used by more than 200 people to purchase breastfeeding and other sexual services. Advertisement The site, which has been in service since 2013, charged users between $48 and $270 to become members and a further $1,600 as a commission fee for services. Officials said the investigation was sparked by a June report in The Beijing News that detailed several websites offering breastfeeding services from young mothers. One of the websites offered two forms of service, "pure" and "impure." The "pure" service involved breastfeeding services for about $6,500 per month, while "impure" added "a deeper level of service," meaning sexual intercourse, for about $8,000. Another website charged just $10 per week to access details about lactating mothers offering breastfeeding services to adults. Read More Keeping it weird in 2014: Big hands, creepy clowns, mystery sea creature Florida high school student arrested for running prostitution ring China bans objectionable TV, movie content Secret Service investigator linked to prostitution