Indonesian police say they have broken up a child trafficking operation that was allegedly buying and selling babies on Instagram. Four people were arrested, including a 22-year-old mother and 29-year-old suspected broker in Indonesia’s second largest city Surabaya, police said in a press conference Sunday. A midwife and a suspected buyer were also arrested on the resort island of Bali. Authorities were alerted to an account on the popular photo-sharing site with the handle “Konsultasi Hati Privat,” or Private Heart Consultation, that presents itself as offering pregnancy consultations and adoption services. However, police said they have found evidence that monetary transactions were being carried out. The head of criminal investigation unit in Surabaya’s police force , AKBP Sudamiran, said Tuesday that his team foiled an attempt by a 22-year-old mother, identified as LA, to sell her 11-month-old baby to a buyer in Bali, known as NS, using the messaging service WhatsApp. The baby was allegedly being offered for 15 million rupiah (about $987). The Instagram account was still active early Friday and had more than 700 followers, having been running for about a year. It has since been taken down.