RIO DE JANEIRO -- Incumbent Ricardo Nunes and leftist lawmaker Guilherme Boulos will face each other in a runoff to decide the next mayor of Sao Paulo after a first round of voting Sunday in Brazil's local elections.

Brazilians commenced voting in crucial local elections involving mayors and city councils. In Sao Paulo, the race is heated with controversies, especially around Pablo Marçal. Rio de Janeiro's polls also evoke suspense as Eduardo Paes contends with Alexandre Ramagem.

Incumbent Eduardo Paes has been reelected for a fourth, non-consecutive term as the mayor of Rio de Janeiro, after winning an absolute majority of votes in the first round of Brazil’s local elections