RIO DE JANEIRO  — Brazil's presidential election has been forced into a runoff vote because no single candidate won a majority of the vote.

With 92 percent of the vote counted, President Dilma Rousseff has won 41 percent of the first-round vote Sunday, according to results from Brazil's top electoral court, which oversees elections.

She will face Aecio Neves of the main opposition party, the Social Democrats, who had 34 percent of the vote. Neves comes from a long line of Brazilian politicians.

There aren't enough uncounted votes for any other challenger to surpass either Rousseff or Neves.

Neves staged a strong comeback to make it to the second round.

He overtook former Environment Minister Marina Silva, who just four weeks ago held a double-digit lead over him and looked like she might win the presidency.

Brazilians voted Sunday in the contest to determine the next leader of Latin America's biggest nation.