A father and son who killed 15 people attending a Jewish festival on Sydney’s Bondi Beach had possible links to ISIS, the Australian Broadcasting Corporation said Monday.Police have yet to provide a motive for Sunday’s mass shooting, but they say it was clearly an antisemitic, terrorist act.For all the latest headlines follow our Google News channel online or via the app.Senior officials in the investigation told the ABC that two ISIS flags were found in the gunmen’s car at the beach, although New South Wales police said they could not confirm the report.Details of the pair are emerging in the hours since the black-clad, 50-year-old father and his 24-year-old son were seen side-by-side on a small bridge, firing long-barreled guns at people on the beach.The father, named in local media as Sajid Akram, was killed in a shootout with police, detectives say.He had licenses for six guns, and police say they believe all of them were used to kill and wound people enjoying a sun-splashed day at