German prosecutors announced on Monday they have busted one of the world’s biggest international darknet platforms for child pornography, used by more than 400,000 registered members.

Frankfurt prosecutors said in a statement together with the Federal Criminal Police Office that in mid-April three German suspects, said to be the administrators of the “Boystown” platform, were arrested along with a German user. One of the three main suspects was arrested in Paraguay. They also searched seven buildings in connection with the porn ring in mid-April in Germany.