Front-runners in Brazil’s presidential race are campaigning in the eve of Sunday’s election in the powerhouse state where a fifth of the nation’s vote is based.

The US and Australia closed diplomatic services in Brazil because of security concerns ahead of the Brazilian election on Sunday.

Brazil heads into a knife-edge presidential vote between Luiz Inacio Lula da Silva and Flavio Bolsonaro. The result will test the country's deep polarisation and may hinge on turnout and late shifts.