What had been a largely peaceful protest by tens of thousands of Spaniards erupts into violence on the streets of Madrid.<br/> <br />Police, also out in force, fire rubber bullets as protesters hurl rocks and bottles.<br/> <br />A central government official said 19 protesters and 50 police officers were hurt.<br/> <br />The violence came after a mass rally against European Union-imposed austerity measures.<br/> <br />The Organisation for Economic Co-operation and Development says they're hitting the poor in Spain more than any other member country.<br/> <br />The march brought demonstrators out onto the streets for causes from employment to housing, health, education and poverty.<br/> <br />Spain tentatively came out of recession in the second half of last year.<br/> <br />Despite unemployment has soared following labour reforms that cut the cost of hiring and firing workers.<br/> <br />A hoped-for jobs boost has yet to materialise.