One resident, whose 75-year-old father was killed, described it as an ambush, saying they were surrounded.

The incident happened on Saturday night, close to an American football stadium where a game had just been played.

As polls pointed to defeat, millions joined a 'Lula's Army' channel that is credited with helping transform online enthusiasm into real-world mobilisation.

Prosecutors have indicted Devin Jacob Ballard for a killing that has caused outrage in Japan, local media reports.