SYDNEY (AP) — Police raided properties in several Sydney suburbs and arrested four men on Saturday on suspicion of plotting a terrorist attack, officials said. The raids related to a bomb plot involving aircraft, Fairfax Media, News Corp. and the Australian Broadcasting Corp. reported. Prime Minister Malcolm Turnbull said the counterterrorism raids on Saturday afternoon were "designed to disrupt and prevent plans to undertake terrorist attacks in Australia." The operation was carried out by the Australian Federal Police, the New South Wales state police and the Australian Security Intelligence Organisation, the country's domestic spy agency.