Prime Minister Scott Morrison has condemned the attack on the US Congress by supporters of outgoing President Donald Trump, describing the scenes as very distressing.
Police were forced to evacuate the US House of Representatives and the Senate on Wednesday after protesters stormed both chambers which were meeting to certify President-elect Joe Biden's victory in the November 3 election.
Police have responded to the attack with drawn guns and tear gas.
Mr Trump has now told his supporters to "go home in peace".
"Very distressing scenes at the US Congress,' Mr Morrison said in a tweet on Thursday.
"We condemn these acts of violence and look forward to a peaceful transfer of government to the newly elected administration in the great American democratic tradition."
Labor leader Anthony Albanese said it was an "assault on the rule of law and democracy".
Two former Australian prime ministers also expressed their outrage on Twitter.
Former Labor prime minister Kevin Rudd described it as a physical attack on the institutions of democracy by a "far right mob".
"All because of extremist statements by political leaders attacking the legal results of a democratic election, echoed faithfully by a cancerous far right media," Mr Rudd said in a tweet.
"This affects us all."
Former Liberal leader Malcolm Turnbull said the mob violence is the culmination of President Trump's sustained assault on American democracy.
"The President should call on the mob he incited to disperse and go home," he tweeted.
"And Trump's supporters in the GOP and the media should reflect on what they have enabled."
Australian Associated Press