Photos: Violent protests break out after peaceful demonstrations in Brazil

Demonstrators clash with the police during the "Teachers' day" protest in demand of better working conditions and against police violence, on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / CHRISTOPHE SIMON/AFP/Getty Images ( 523804396 )

Policemen clash with demonstrators after a protest for the "Teachers' day", on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / CHRISTOPHE SIMON/AFP/Getty Images ( 523804812 )

Demonstrator runs near a burning barricade after a protest for the "Teachers' day", on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / CHRISTOPHE SIMON/AFP/Getty Images ( 523805659 )

Demonstrators light a fire during the "Teachers' day" protest in demand of better working conditions and against police violence, on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / CHRISTOPHE SIMON/AFP/Getty Images ( 523804460 )

Policemen clash with demonstrators after a protest for the "Teachers' day", on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO/VANDERLEI ALMEIDA/AFP/Getty Images ( 523805612 )

Demonstrators clash with the police during the "Teachers' day" protest in demand of better working conditions and against police violence, on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / CHRISTOPHE SIMON/AFP/Getty Images ( 523804160 )

Demonstrators clash with the police during the "Teachers' day" protest in demand of better working conditions and against police violence, on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / CHRISTOPHE SIMON/AFP/Getty Images ( 523804178 )

Demonstrators clash with the police during the "Teachers' day" protest in demand of better working conditions and against police violence, on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / CHRISTOPHE SIMON/AFP/Getty Images ( 523804324 )

A demonstrator with the Guy Fawkes mask clashes with the police during the "Teachers' day" protest in demand of better working conditions and against police violence, on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / CHRISTOPHE SIMON/AFP/Getty Images ( 523804150 )

Policemen clash with demonstrator during the "Teachers' day" protest in demand of better working conditions and against police violence, on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / CHRISTOPHE SIMON/AFP/Getty Images ( 523804362 )

Policemen clash with demonstrators after a protest for the "Teachers' day", on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / YASUYOSHI CHIBA/AFP/Getty Images ( 523804874 )

Policemen clash with demonstrators after a protest for the "Teachers' day", on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO/VANDERLEI ALMEIDA/AFP/Getty Images ( 523806123 )

Demonstrators clash with the police during the "Teachers' day" protest in demand of better working conditions and against police violence, on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / CHRISTOPHE SIMON/AFP/Getty Images ( 523804602 )

Demonstrators clash with the police after the "Teachers' day" protest in demand of better working conditions and against police violence, on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / CHRISTOPHE SIMON/AFP/Getty Images ( 523804625 )

Demonstrators clash with the police during the "Teachers' day" protest in demand of better working conditions and against police violence, on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / CHRISTOPHE SIMON/AFP/Getty Images ( 523804467 )

Policemen arrest a demonstrator during clashes after a protest for the "Teachers' day" in demand of better working conditions and against police violence, on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / YASUYOSHI CHIBA/AFP/Getty Images ( 523804254 )

Demonstrators clash with the police during the "Teachers' day" protest in demand of better working conditions and against police violence, on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / CHRISTOPHE SIMON/AFP/Getty Images ( 523804462 )

Aerial view of clashes between demonstrators and police after a protest for the "Teachers' day", on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO/VANDERLEI ALMEIDA/AFP/Getty Images ( 523806064 )

Demonstrators clash with the police during the "Teachers' day" protest in demand of better working conditions and against police violence, on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / CHRISTOPHE SIMON/AFP/Getty Images ( 523804594 )

A policeman remains next to a damaged police bus during clashes after a protest for the "Teachers' day", on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / CHRISTOPHE SIMON/AFP/Getty Images ( 523804450 )

Policemen clash with demonstrators after a protest for the "Teachers' day", on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / CHRISTOPHE SIMON/AFP/Getty Images ( 523806034 )

Demonstrators clash with the police after a protest for the "Teachers' day", on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / CHRISTOPHE SIMON/AFP/Getty Images ( 523805950 )

A demonstrator clashes with the police after a protest for the "Teachers' day", on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / YASUYOSHI CHIBA/AFP/Getty Images ( 523805924 )

Policemen arrest a demonstrator during clashes after a protest for the "Teachers' day", on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / YASUYOSHI CHIBA/AFP/Getty Images ( 523805218 )

Policemen clash with demonstrators after a protest for the "Teachers' day", on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO/VANDERLEI ALMEIDA/AFP/Getty Images ( 523805100 )

Policemen clash with demonstrators after a protest for the "Teachers' day", on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO/VANDERLEI ALMEIDA/AFP/Getty Images ( 523806105 )

A police helicopter patrols during clashes with demonstrators after a protest for the "Teachers' day", on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO/VANDERLEI ALMEIDA/AFP/Getty Images ( 523805413 )

Policemen clash with demonstrators after a protest for the "Teachers' day", on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO/VANDERLEI ALMEIDA/AFP/Getty Images ( 523805617 )

Demonstrators remain near a burning barricade after a protest for the "Teachers' day", on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / CHRISTOPHE SIMON/AFP/Getty Images ( 523805676 )

Policemen clash with demonstrators after a protest for the "Teachers' day", on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO/VANDERLEI ALMEIDA/AFP/Getty Images ( 523805629 )

Riot policemen clash with demonstrators after a protest for the "Teachers' day", on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO/VANDERLEI ALMEIDA/AFP/Getty Images ( 523805723 )

Demonstrators clash with police after a protest for the "Teachers' day", on October 15, 2013 in Rio de Janeiro, Brazil. AFP PHOTO / CHRISTOPHE SIMON/AFP/Getty Images ( 523805817 )