German police have uncovered one of the world’s largest underground websites for child pornography with more than 400,000 users and arrested four people connected to the platform, prosecutors said on Monday.

The BOYSTOWN platform has existed since at least June 2019 and was only accessible via the so-called Darknet, the Frankfurt public prosecutor’s office and the BKA Federal Police said in a statement.

The website had more than 400,000 users and was used for the worldwide exchange of child pornography. It enabled members to retrieve child pornography content and exchange footage with each other in chat areas as well as via voice channels...