All the victims are boys, and the youngest at the time of the alleged attacks was 11 years of age. The case refers to tens of cases that are alleged to have taken place between 2004 and 2011. Two cases involve aggravated child sexual abuse.
The suspects are between 30 and 40 years old, and they were arrested in Kuopio, Tampere and Oulu. One is still in custody.
The preliminary investigation turned up tens of thousands of images and hundreds of video recordings of child pornography. Some of them show violence against children. Police suspect that the accused also distributed pornography online.
The case has now been passed to the prosecutor.