BRASILIA, May 10 (Xinhua) -- Former Brazilian president Luiz Inacio Lula da Silva took the lead in the polls ahead of general elections in October, according to a survey released on Tuesday.

Lula garnered 40.6 percent of voters' support, followed by current President Jair Bolsonaro with 32 percent, it showed.

The result, which was made by the MDA Institute and released by the National Transport Confederation (CNT), showed that the gap between the two top candidates was narrowing.

In a prior poll in February, Lula, the candidate of the Workers' Party (PT), has 42.2 percent of the support, compared with 28 percent for Bolsonaro of the Liberal Party (PL).

Trailing far behind in the third place in Tuesday's poll was Ciro Gomes of the Democratic Labor Party (PDT), with 7.1 percent of voters' support, followed by Joao Doria of the Brazilian Social Democracy Party (PSDB), with 3.1 percent.

The survey, which queried 2,002 people in 137 cities in 25 states from May 4 to 7, revealed "more political polarization compared to the 2018 elections," the CNT said.