Brazilian elections go to runoff

Supporters of José Serra, candidate for the Brazilian Social Democracy party, celebrate in Sao Paulo after their man takes Rousseff to a runoff vote Photograph: Andre Penner/AP Serra must now woo environmentalists and others who backed the Green party candidate, Marina Silva, in Sunday's vote Photograph: Mauricio Lima/AFP/Getty Images Workers' party candidate Rousseff failed to obtain the necessary 50%-plus-one of the total votes Photograph: Natacha Pisarenko/AP Silva speaks to supporters. The former environment minister finished third but exceeded all polling expectations Photograph: Nelson Antoine/AP Street politics: electoral leaflets litter the pavement outside a polling station in Brasilia Photograph: Eraldo Peres/AP Waiting to vote at a polling station in Brasilia Photograph: Ricardo Moraes/Reuters Umbrella group: the scene outside a polling station in Rio de Janeiro Photograph: Natacha Pisarenko/AP A polling station in Rocinha, the largest favela in Rio Photograph: Natacha Pisarenko/AP Serra gestures to the press after voting in Sao Paulo Photograph: Nelson Antoine/AP Workers' party colleague Tarso Genro kisses Rousseff in Porto Alegre, Rio Grande do Sul state Photograph: Jefferson Bernardes/AFP/Getty Images In reflective mood, voters wait to deliver their verdict on the candidates Photograph: Bruno Domingos/Reuters President Lula at a press conference after casting his vote in Sao Bernardo do Campo Photograph: Reuters