When an object was thrown off a balcony into a crowded square in the heart of Perth’s main shopping mall, it did not register as a threat, with many thinking it was an empty coffee cup or a piece of rubbish.
But police have since said the device, which was allegedly lobbed into the middle of an Invasion Day rally on Monday, was a homemade bomb that had the potential to explode and injure or even kill “many people”.