This is an extremist and violent network, dedicated to recruiting and exploiting minors online, which encourages its members to exchange child pornography and images of extreme sexual violence. It is called 764 and this week the alleged leader of the group in Spain was arrested. A joint operation by the Mossos, the Ertzaintza and the Guardia Civil has led to the arrest in Gipuzkoa of a 17-year-old minor who allegedly sent threats to educational centers, town halls, social associations, public bodies and various personalities.