WASHINGTON, Jan. 6 (Xinhua) -- Washington D.C. Mayor Muriel Bowser on Wednesday night extended the public emergency to 15 days, until the day after President-elect Joe Biden's inauguration.

File photo of District of Columbia Mayor Muriel Bowser. (Photo: AFP)

The mayor's latest order followed a citywide curfew from Wednesday night to Thursday morning in response to Capitol chaos earlier in the day.

On Wednesday afternoon, supporters of outgoing Republican President Donald Trump pushed through barriers at the Capitol building, interrupting the certification of the 2020 electoral votes, and forcing a Capitol lockdown.

"Today, First Amendment protests turned violent. Many persons came to the District armed and for the purpose of engaging in violence and destruction and have engaged in violence and destruction," Bowser said in a statement.

"They have fired chemical irritants, bricks, bottles, and guns. They have breached the security of the Capitol and their destructive and riotous behavior has the potential to spread beyond the Capitol," she said. "Their motivation is ongoing."

Trump has refused to acknowledge defeat in the 2020 presidential race with Biden and is still pushing claims of a "fraudulent" election, which had been dismissed by U.S. courts at different levels due to a profound lack of evidence.

Accusing Trump of continuing to "fan rage and violence" by contending that the presidential election was invalid, Bowser said "persons are dissatisfied with judicial rulings and the findings of State Boards of Elections, and some persons can be expected to continue their violent protests through the inauguration."

In a video clip posted on Twitter in the wake of the chaotic situation, Trump urged his supporters to "go home" after demonstrations.

"You have to go home now. We have to have peace," said the outgoing Republican president. "We have to have law and order. We have to respect our great people in law and order. We don't want anybody hurt."

Confrontations between law enforcement officers and protesters have caused injuries from both sides. At least four people have died around the Capitol area, according to the police.