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