The prime minister knew 'for some time' that an explosives-laden caravan found in Sydney was likely a hoax threat despite initially labeling it an act of terrorism. Police have revealed that the caravan was dismissed as a ruse carried out by organized criminals. The presence of industrial explosives and a note listing Jewish sites prompted leaders to declare it an act of terrorism. The investigation has led to the arrest of 29 people, but none are believed to be ideologically motivated.