Riot police have ringed the Spanish parliament in Madrid as protesters gather for a march against austerity tagged "Occupy Congress".
Metal barriers have been placed around the building to block access from every possible direction, correspondents say.
Indignants, as the protesters are known, say they are protesting at the "kidnapping" of democracy.
Spain's provinces have piled pressure on the government with a possible new bailout request and an early election.
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