# Spain crackdown on extremist networks

> Live situation record from CLSTR: https://clstr.news/situations/spain-crackdown-on-extremist-networks
> Updated: 2026-08-02T14:46:11.000Z. Sources: 17. Developments: 2.

In July 2026 Spain led Europe in arrests of individuals linked to jihadist activity for 2025, highlighting a broad security push against extremist groups.  A few weeks later, the Guardia Civil, the Basque Ertzaintza and the Catalan Mossos d'Esquadra carried out a joint operation in Gipuzkoa near the French border, arresting a 17‑year‑old Spanish national identified as the leader of the online extremist 764 network.  Between January and April 2026 the group sent dozens of threatening messages to schools, town halls, libraries and other institutions, even announcing planned shootings and armed attacks that never materialised, prompting extensive security protocols.

Police searched two apartments, seizing electronic devices, storage media and documentation.  The suspect was presented before a juvenile court in Donostia and transferred to a specialized detention centre.  The 764 network, named after the Stephenville, Texas ZIP code where it originated, is linked to sextortion, child sexual‑abuse material, incitement of self‑harm, extreme violence and animal cruelty, and has been designated a terrorist organization by Canada.

## Claims

- The Guardia Civil, Ertzaintza and Mossos d'Esquadra jointly conducted an operation in Gipuzkoa that resulted in the arrest of a 17‑year‑old Spanish national. (corroborated by 4 sources)
- The arrested individual is considered the main figure of the 764 extremist network in Spain. (corroborated by 4 sources)
- The 764 network sent threats to schools, town halls, libraries and other public and private institutions between January and April 2026. (corroborated by 4 sources)
- The threats announced planned shootings and armed attacks, but none were carried out. (corroborated by 4 sources)
- Police seized electronic devices, storage media and documents during searches of two homes in Gipuzkoa. (corroborated by 4 sources)
- The suspect was placed before a court and is being held in a specialized juvenile detention centre in Donostia‑San Sebastián. (corroborated by 4 sources)
- The 764 network originated in the United States and is named after the first three digits of Stephenville, Texas ZIP code. (corroborated by 3 sources)
- The network is linked to sextortion, distribution of child sexual‑abuse material, incitement of self‑harm, extreme violence content and animal cruelty. (corroborated by 3 sources)

## Timeline

### 2026-08-02: Spain arrests 17‑year‑old leader of extremist 764 network

Spain’s Guardia Civil, Ertzaintza and Mossos d'Esquadra arrested a 17‑year‑old as the chief figure of the 764 extremist network after it threatened schools and public venues; the suspect is now in a juvenile‑d​

17 sources. https://clstr.news/cluster/spain-arrests-17-year-old-leader-of-extremist-764-network

### 2026-07-12: Spain Leads Europe in Jihadist Arrests for 2025

Spain recorded 100 jihadist arrests in 2025—the most in Europe—as authorities confront a shift toward young, tech‑savvy extremists operating online, according to Europol.

5 sources. https://clstr.news/cluster/spain-leads-europe-in-jihadist-arrests-for-2025

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Cite as: Spain crackdown on extremist networks. CLSTR, https://clstr.news/situations/spain-crackdown-on-extremist-networks