JAKARTA, Indonesia (AP) — Indonesian police say they will cooperate with Interpol in the investigation of an alleged child trafficking syndicate selling Indonesian babies abroad.

Police recently arrested seven women in the capital and rescued three babies including one who was to have been sold in Singapore before the ring was revealed last month.

Jakarta police spokesman Col. Rikwanto said they are compiling data to provide to Interpol for an investigation of a possible network abroad.

The main suspect, a midwife, told police they had operated since 2010 and sold three or four babies per year, but documents discovered by investigators show the syndicate had been operating since 1992 and sold at least 12 babies since December.

Police are investigating the possible involvement of government officials who allegedly provided fake documents for the babies.