What should have been a routine event quickly descended into chaos as protesters incited by the US president violently breached the Capitol.
We take a look at some of the shocking images that emerged in Washington DC:
A supporter of President Donald Trump confronts police as Trump supporters demonstrate on the second floor of the U.S. Capitol near the entrance to the Senate after breaching security defences.
A Trump supporter carries a Confederate battle flag on the second floor of the U.S. Capitol.
Trump supporters gather near the Washington Monument by the White House ahead of his rally and speech to contest the certification by the U.S. Congress of the results of the 2020 U.S. presidential election.
U.S. Capitol Police evacuate journalists and House press staff members from the Capitol to a connected office building.
Protesters gather in front of the U.S. Capitol Building in Washington.
Pro-Trump demonstrators rally to protest the results of the 2020 U.S. presidential election.
Trump speaks during a rally to contest the certification of the election results by Congress.
An explosion caused by a police munition is seen while supporters of Trump gather in front of the U.S. Capitol Building.
Pro-Trump protesters climb on walls at the U.S. Capitol.
Protesters demonstrate on the second floor of the U.S. Capitol near the entrance to the Senate.
Supporters of Trump set off a fire extinguisher after breaching security defences, as police move in on the demonstration on the second floor of the U.S. Capitol.
Pro-Trump protesters wave banners during clashes with Capitol police.
Protesters clash with Capitol police at a rally to contest the certification of the election results.
Rioters stand on the US Capitol building to protest the official election of President-elect Joe Biden.