NSW Police are investigating explosives found in a caravan on a rural property outside Sydney and signs they might have been intended for an antisemitic attack, in what Premier Chris Minns described as the “discovery of a potential mass casualty event”.

Prime Minister Anthony Albanese quickly issued a statement to “condemn unquivocally this act” after police on Wednesday revealed the discovery of the explosives and called it an escalation in a wave of recent anti-Jew hatred.