TsunamiDemocràtic announced itself across Twitter, Instagram and Telegram on 2 September this year.
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It was the brainchild of a secretive new group called TsunamiDemocràtic that is using apps and social media to control and co-ordinate the protests.
Ús de democratic tsunami en anglès
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A government source said authorities were investigating whether Puigdemont could be behind DemocraticTsunami.
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Secretive campaign group DemocraticTsunami, which has organized mass protests including at Barcelona airport last month, claimed responsibility for Monday's disruption.
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Attention has focused on DemocraticTsunami, a new group that emerged last month and quickly gained a huge social media following.
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DemocraticTsunami told Reuters it is a "horizontal and adaptable network" of people living in several countries, without a leadership.
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The protests that led to serious clashes between protesters and police this week were not called by DemocraticTsunami but by other secessionist groups.
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DemocraticTsunami had said last week that it would organize a three-day protest from Monday that would be its "most ambitious" action.