Authorities have confirmed they're investigating the alleged throwing of a bomb into a crowd at an Invasion Day rally in Perth as a "potential terrorist act".

A 31-year old man has been charged with endangering lives or safety, and he's also been charged with making or possessing explosives under suspicious circumstances in connection with the Australia Day incident.GuestAnne Aly, Minister for Multicultural Affairs, and also a counter-terrorism expertProducersIsadora BogleJason Whittaker