Four people have died after a mob stormed the US Capitol building.
Officials say one woman was shot by police, and there were three deaths as a result of 'medical emergencies'.
Lawmakers have since returned to the Capitol to finish the certification of Joe Biden's election victory over Donald Trump.
Trump supporters surged towards the building on Wednesday as a joint session of Congress was underway, saying they wanted to overturn the election result.
Donald Trump later praised the rioters, while also calling for them to go home, but has had his Twitter and Facebook accounts frozen.
Republican leader in the Senate Mitch McConnell - condemned the scenes.
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Democrat Speaker of the House of Representatives Nancy Pelosi says she's shocked.
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US correspondent Simon Marks says it's possible President Trump could be forced aside early.
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Washington Bureau Chief for the Guardian - David Smith - says there are now major questions over security.
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