Policia Nacional have detained 15 people on suspicion of the posession and distribution of indecent images of children.
Officers made the arrests as part of a nationwide operation, with raids carried out in Albacete, Badajoz, Barcelona, Las Palmas, Madrid, Malaga, Murcia, Orense and Santa Cruz de Tenerife.
Two children have been identified as part of the ring, which sold and shared the images – some which were rated as the worst possible – via social media networks.
The investigation was launched following a tip-off from authorities in the United States.
19 mobile phones, 14 laptops, six hard drives, four memory sticks, three tablets and other digital devices were all confiscated during the raids.