Thousands of people have taken to the streets of Rio de Janeiro in a student-led protest against presidential candidate Flavio Bolsonaro and the growing influence of Brazil’s far right.

The march happened on Wednesday, just days after far-right Senator Flavio Bolsonaro, the son of former President Jair Bolsonaro, earned the most votes in the first round of the country’s presidential race.

Bolsonaro won 47 percent, ahead of his closest rival, incumbent left-wing President Luiz Inacio Lula da Silva, who gained 45 percent support.

Since neither candidate surpassed the 50 percent threshold, they will face each other in a run-off on October 25.

The results have triggered fears that Brazil could become the latest Latin American country to see its presidency switch from left to right.

Protesters marched through downtown Rio carrying signs reading “Never again Bolsonaro” and “No to the father, no to the son”. Others held banners reading “Dictatorship never again” and “Get out Bolsonaro”.

“I’m here because I believe in democracy. Because I’m scared,” said Alice Carneiro, 25, an administrator in maritime shipping who participated in the protests. She explained that, under a far-right government, she feared a backlash against her wife, who is transgender.

Jair Bolsonaro, the former president, led the country from 2019 to 2023. But his single-term tenure was marked by a series of controversies related to his far-right policies.

He voiced support for Brazil’s past military dictatorship, which was responsible for the disappearance and murder of hundreds of perceived dissidents. He also spread unfounded claims about the accuracy of Brazil’s election system, leading to a court ruling that barred him from holding office for eight years.

Currently, the former president is serving a 27-year sentence after being convicted of plotting to overturn his 2022 election defeat. After Lula’s inauguration in 2023, Bolsonaro’s supporters stormed government buildings in the capital, reportedly hoping to trigger a military uprising.

Critics have framed Jair Bolsonaro’s actions as a threat to Brazil’s democracy.

But Senator Flavio Bolsonaro has received his father’s endorsement, and he has backed amnesty for his father, a prospect that has raised concerns among protesters.

“I find this rise of the far right and the rise of Bolsonarism in Brazil very, very sad,” said Emmanuel Araujo, 19, who is preparing for university entrance exams.

“Lula might not be my preferred candidate,” Araujo added, “but amid this barbarism, we have to choose between someone we can keep criticising and someone who might take away our right to speak.”