Lula and Bolsonaro trade barbs in Brazil election debate

• Brazil's left-wing President, Luiz Inácio Lula da Silva, and his right-wing rival, Senator Flávio Bolsonaro, have clashed in a debate held one week before the run-off presidential election.
• Polls suggest the two candidates are neck and neck and the televised debate was hailed as a chance for both to sway undecided voters.
• But the showdown was marked by personal attacks and analysts have warned that its aggressive tone may increase the abstention rate further.