Far-right congressman Jair Bolsonaro has won the first round of Brazil-s presidential election following one of the most polarising campaigns since the country returned to democracy three decades ago, according to the country-s Supreme Electoral Tribunal.

Bolsonaro won Sunday-s poll with 46.5 per cent of the vote, ahead of left-wing former Sao Paulo Mayor Fernando Haddad from the Workers- Party on 28.5 per cent, CNN reported. Bolsonaro-s lead, in a field of 13 candidates, left him just short of the 50 per cent needed to win outright and unable to avoid a runoff against Haddad on October 28.