(Photo : Spencer Platt/Getty Images)
Members of the National Guard and the Washington D.C. police keep a small group of demonstrators away from the U.S. Capitol on January 06, 2021 in Washington, DC.

Four people, including a woman fatally shot by a police officer, died in the violent Capitol riot between President Donald Trump's supporters and law enforcement on Wednesday.

DC Mayor Muriel Bowser and Police Chief Robert Contee have confirmed with CBS affiliate WUSA 9 that someone was injured during the Capitol riot. But at the time, they did not release that it was the woman fatally shot and eventually mentioned in several reports.

Reports of three more deaths related to the Capitol riot soon followed, taking two men and another woman's lives.

The first reported woman, who was fatally shot inside the building, was rushed to the hospital and remained unidentified until her death later in the evening, said a report from ABC News.

Woman Fatally Shot by Capitol Police

Sources from law enforcement told New York Post that someone from Capitol Police shot the woman.

The woman succumbed to her injuries and was pronounced dead at a local hospital, said police department spokesman Dustin Sternbeck.

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Authorities have yet to release her identification, and no information has been released regarding who shot her, said a report from the New York Times. However, Contee earlier described her as a "civilian."

In the meantime, officers were leading the investigation of events leading to her death. It is not yet clear what exactly led to the woman's fatal shooting and death. But a photo from CBS News' Zak Hudak showed that law enforcement had drawn their guns when rioters broke into the building. Sternbeck offered no other details.

Meanwhile, the three others died after suffering "separate medical emergencies" near the Capitol grounds, reported The Hill. Reports regarding their deaths remain limited.

DC Mayor Denounces Capitol Riot

Bowser was deeply upset by the news and said the behavior displayed by the mob was "shameful unpatriotic and above all it is unlawful."

During her news conference on Wednesday afternoon, she called for the people who engaged and continue to engage in these activities to be held accountable.

Law enforcement personnel, including the US Park Police, DC Police, and National Guard, worked to move pro-Trump rioters and others gathered in front of the US Capitol building to create a safety perimeter.

A lockdown was placed in the Capitol around 2:30 p.m., causing evacuations of two campus buildings, the Library of Congress James Madison Memorial Building and the Cannon House Office Building.

The lockdown has since been lifted, US Park Police officials said. In light of the violent events, Bowser ordered a 12-hour curfew in the city beginning at 6 p.m. that day. 

Bowser also extended her declaration of public emergency for the next 15 days, said another report from The Hill. It is expected to end on Tuesday, January 21, at 3 p.m., the day after President-elect Joe Biden's inauguration.

Social media was teeming with images of the protesters in the middle of scuffles with the police.

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Officials said the campus rooms had been check for devices, and the Senate resumed session later that evening. During the session, Vice President Mike Pence and Senate GOP leader Mitch McConnell also condemned the Capitol riot.

"We will not be kept out of this chamber by mobs or thugs or threats," McConnell said, adding that the Senate will not be pushed back by "lawlessness or intimidation."