Spain rally: Podemos holds Madrid mass 'March for Change'
Tens of thousands of people have massed in central Madrid for a rally organised by radical Spanish leftists Podemos.
Podemos has surged into the lead in recent opinion polls, and says it will seek to write off part of Spain's debt if it wins elections later this year.
Podemos says politicians should "serve the people, not private interests".
The BBC's Tom Burridge in Madrid says that there has been an impressive turnout and a carnival atmosphere at the rally.
Podemos leader Pablo Iglesias spelt out the party's message to the crowd.
"We want change," he said, quoted by the Associated Press. "I know that governing is difficult but those who have serious dreams can change things."
Protesters are parading in the same streets that over the past six years have seen many other gatherings against financial crisis cutbacks imposed by successive governments.
One marcher, Jose Maria Jacobo, told Reuters news agency that people had to fight back against the political class.
"It is the only way..., to kick out all of those politicians who are taking everything from us. They even try to take our dignity away from us. But that they won't take that from us," he said.