SYDNEY — Australian police said Tuesday they were investigating why a father and son travelled to the Philippines a month before carrying out a mass shooting at Bondi Beach. "The reasons why they went to the Philippines, and the purpose of that, and where they went, is under investigation at the moment," New South Wales Police commissioner Mal Lanyon told reporters. Sajid Akram and his son Naveed opened fire on Jewish crowds thronging the famous beach for Hanukkah on Sunday evening, killing 15 people and wounding dozens more. Authorities said the attack was designed to sow panic among the nation's Jews, but have so far given little detail on the gunmen's deeper motivations. Prime Minister Anthony Albanese said the shooters were likely driven by "Islamic State ideology" when they fired on Bondi Beach in one of Australia's deadliest mass shootings.