The referendum is centred around the acknowledgement of indigenous Australians within the nation's Constitution and the establishment of an indigenous advisory body known as the "Voice to Parliament".
According to a report by Daily Mail Australia, some of the vandals were masked and hurled lit flares at more than 100 cops who were lined up to prevent them from entering the Sydney Opera House.
The Osprey aircraft crashed during Exercise Predators Run, a training exercise involving troops from US, Australia, Indonesia, Philippines, and East Timor.