World leaders have condemned the storming of the US Capitol building in Washington, with many expressing their shock and outrage.
Such chaotic scenes might normally be associated with the toppling of a dictator, but this was an attempt by American citizens to stop a peaceful transition to power after a democratic election.
One woman was killed after being shot by security, while three others died following medical emergencies.
Leaders around the world issued statements or posted on social media during and after the chaos.
Here is some of the reaction:
UN
UN Secretary-General Antonio Guterres “is saddened by the events at the US Capitol,” spokesman Stephane Dujarric said.
“In such circumstances, it is important that political leaders impress on their followers the need to refrain from violence, as well as to respect democratic processes and the rule of law.”
UK
“Disgraceful scenes in US Congress,” tweeted Prime Minister Boris Johnson.
“The United States stands for democracy around the world and it is now vital that there should be a peaceful and orderly transfer of power.”
Four dead as outrage grows over storming of Congress – live updates
Australia
“The riots and protests that we’ve seen in Washington, DC, have been terribly distressing. They are very concerning,” Prime Minister Scott Morrison told reporters.
“This is a difficult time for the United States, clearly. They’re a great friend of Australia, and they’re one of the world’s greatest democracies. And so… our thoughts are with them and we hope for the peaceful transition to take place,” he said.
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Moment woman shot dead by police inside Capitol.
NATO secretary general
Jens Stoltenberg tweeted: “Shocking scenes in Washington, DC. The outcome of this democratic election must be respected.”
Canada
Prime Minister Justin Trudeau said his country was “deeply disturbed” by the events in the US, Canada’s closest ally and neighbour.
“Violence will never succeed in overruling the will of the people. Democracy in the US must be upheld – and it will be,” Mr Trudeau tweeted.
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How chaos unfolded at the Capitol
New Zealand
“What is happening is wrong,” Prime Minister Jacinda Ardern said in a statement.
“Democracy – the right of people to exercise a vote, have their voice heard and then have that decision upheld peacefully – should never be undone by a mob.”
Spain
Prime Minister Pedro Sanchez said in a tweet: “I am following with concern the news that are coming from Capitol Hill in Washington. I trust in the strength of America’s democracy.
“The new Presidency of @JoeBiden will overcome this time of tension, uniting the American people.”
Brazil
“In this sad episode in the US, supporters of fascism showed their real face: anti-democratic and aggressive,” tweeted Luis Roberto Barroso, Brazilian Supreme Court justice and the head of the country’s electoral court.
He said he hoped “American society and institutions react with vigour to this threat to democracy.”