The protesters evaded barracades and entered the building, prompting the buildings lockdown.
Smashing windows to enter the building, throngs of right-wing protesters fought with Capitol police once inside, brandishing Trump banners and confederacy flags and cheering from the balconies of the Capitol.
Protesters trying to intervine were Pro-Trump protesters.
The US Congress also had to suspend an ongoing debate on Republicans’ attempts to overturn the electoral victory of President-elect Joe Biden.
One woman was also shot by a police officer, and soon died.
“In this hour, our democracy is under unprecedented assault, unlike anything we’ve seen in modern times. An assault on the citadel of liberty, the Capitol itself,” said Mr Biden in a brief media appearance from Wilmington, Delaware.
In this hour, our democracy is under unprecedented assault, unlike anything we’ve seen in modern times.Joe Biden (President-Elect USA)
Just hours before, Mr Trump appeared at a rally in front of thousands of protesters, again claiming that the election had been stolen from him.
He urged them to march on the Capitol to “cheer on” Congress and “show strength”, promising he would be there alongside them. He was not, and in a tweet issued after protesters forced their way into the Capitol, Mr Trump asked “everyone at the US Capitol to remain peaceful. No violence!”
After being urged to call for an end to the violence, Mr Trump released a brief video on Twitter repeating his false claims of electoral fraud. “We had an election that was stolen from us…but you have to go home now. We have to have peace. We have to have law and order,” he said.
“There’s never been a time like this, where such a thing happened – where they can take it away from all of us,” Mr Trump added. “This was a fraudulent election, but we can’t play into the hands of these people.”
Twitter later suspended Mr Trump from tweeting for 12 hours and threatened to permanently ban him from the platform for flouting its civic integrity rules.