Australian police fatally shot an armed teenager after he attacked a man in a suburb of Perth Saturday night, authorities confirmed in a press conference Sunday.

Australian police said on Sunday they had shot dead a boy after he stabbed a man in Western Australia's capital Perth, in an attack authorities said indicated terrorism.

Harrowing footage has been released of the moment Western Australia Police killed a teenage boy who allegedly attacked them with a knife after having stabbed a man in a Bunnings Warehouse car park.