The alleged throwing of a homemade bomb into an Invasion Day rally crowd must be treated as a racial hate crime, Indigenous advocates say. Police are investigating the incident as a potential terrorist act, saying it was only because of good luck the device did not explode. "We are worried for our kids and their safety on this day because of this rising right-wing influence and racism that really hasn't abated in Australia," she told AAP. Social Justice Commissioner Katie Kiss said the potential for mass casualties caused deep distress and fear among First Nations people. Indigenous Australians Minister Malarndirri McCarthy said she was pleased the incident was being considered a potential terrorist act.