Brazilian President Jair Bolsonaro's voter support grew by three percentage points from last month, while approval for his rival, Luiz Inacio Lula da Silva, remained flat ahead of the country's October elections, a survey by pollster Datafolha showed on Thursday.

Since relevant agencies have failed to publish the electoral Royal Decree to announce a date for the national elections, uncertainty over whether the vote will even be held has become a top concern, a Suan Dusit poll learned recently.