Jewish students in Sydney returned to school on Friday with a heightened security presence, days after police said they foiled a planned antisemitic attack in the city using a trailer filled with explosives.

Australian authorities say they’ve foiled a potential “mass casualty” attack with the discovery of a trailer packed with explosives in northwest Sydney, and “an indication” it was to be used against targets in the Jewish community following a spate of antisemitic incidents.

The explosives located in a caravan could have caused a 'potential mass casualty event', authorities have said.