Former president Luiz Inacio Lula da Silva says Brazil's politicians should prepare themselves for an increase in violence in the run-up to elections.
"I think that all of us who are politicians have to be aware of the violence provoked by those who do not know how to live democratically,” he said.
His remarks came a day after a purportedly unsuccessful assassination of Argentina's vice president, Cristina Fernandez de Kirchner.
The incident happened on Thursday when Kirchner was greeting supporters outside her home in the Buenos Aires neighborhood, who had rallied for days to protest against corruption charges against her.
This and other similar attempts to assassinate political officials have forced the main presidential candidates in Brazil to review all security measures before the start of voting on October 2.
Lula and incumbent President Jair Bolsonaro are currently the two main rivals in the upcoming elections in Brazil.
Polls show that Lula is ahead of Bolsonaro by a margin and could be the likely winner of the election.
Bolsonaro said in the election campaigns that he will do his best to win the elections, asking his supporters to defend him to the death.
Lula is seen winning 44% support in a first-round vote against Bolsonaro's 32%, a Genial/Quaest poll showed on Wednesday.