In a sombre start to the first major sporting event in Australia since Sunday's attack left 15 dead and dozens wounded, both sides bowed their heads at Adelaide Oval in tribute to the victims.

Police armed with rifles will be part of a beefed up security presence at the third Test between Australia and England at Adelaide Oval after the Bondi Beach shooting attacks, officials said, while flags will be flown at half-mast.

Police did not release the shooters' names, but said the father had held a firearms license since 2015 and had six licensed weapons.

PM Albanese says dark day for Australia, security agencies investigating