"We recognize the results of the presidential election . . . but we believe that the issues raised must be addressed," the party said in a statement.
Bolsonaro, the son of jailed former president Jair Bolsonaro, has criticized the extension of polling station hours on Sunday evening. He himself requested the extension in some places, but has called it “unacceptable.”
However, on Monday evening, Bolsonaro said he would lead the opposition against Lula.
Leftist President Lula da Silva won Sunday's second round of the presidential election with 51.8 percent of the vote. That gave Lula around 4.4 million more votes. He turns 81 on Tuesday and has thus secured a fourth term as president.
