A police statement today said the network operated some 100 chat groups with 135 identified users in 18 countries in Europe, Central and South America.
The statement said 17 people were arrested in Spain, with other detentions made in Argentina, Bolivia, Chile, Colombia, Costa Rica, Ecuador, El Salvador, Germany, Guatemala, Italy, Mexico, Paraguay, Peru and Portugal.
The operation was carried out in coordination with Interpol and Europol.
Spanish police said files retrieved contained abusive and brutal treatment of children up to 8 years of age.
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