Four people were killed, one of them a woman who was shot to death by police inside the Capitol.
Three other people died after suffering “medical emergencies” related to the rape, said Robert Contee, chief of the city’s Metropolitan Police Department.
Police said 52 people were arrested as of Wednesday night, including 26 on the Capitol grounds.
Fourteen police officers were injured, Contee said.
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Zoe Lofgren, Democratic Representative from California and chair of the House Administration Committee, said the breach “raises serious security concerns,” adding that her committee will work with House and Senate leaders to review the response. of the police and their preparation.
Lawmakers ducked under desks and donned gas masks as police tried futilely to barricade the building as people marched on Capitol Hill from a rally near the White House in support of President Donald Trump.
The mayor of Washington instituted a night curfew in an attempt to contain the violence.
Val Demings, a Florida Democratic Rep. And former police chief, said it was “painfully obvious” that the Capitol police “weren’t ready for today.”
“I certainly thought we would have had a stronger show of force, that steps would have been taken early on to make sure there was a designated area for protesters at a safe distance from the Capitol,” Demings said. said.
In an interview with MSNBC on Wednesday night, Ms Demings said that it appeared the police were understaffed, adding that they “did not appear to have a clear operational plan to actually deal with” thousands of protesters who turned up on Capitol Hill. following Trump’s complaints of a “rigged election.”
The rioters were incited by Trump, who spent weeks falsely attacking the integrity of the election and had urged his supporters to come to Washington to protest Congressional formal approval of President-elect Joe Biden’s victory.
The protests interrupted those proceedings for almost seven hours.
The mob smashed windows, entered the Senate and House chambers, and entered the offices of legislators, including Speaker of the House, Nancy Pelosi.
Ms. Demings said there were “a lot of unanswered questions and I’m very determined to get answers to those questions about what went wrong today.”
A police spokeswoman could not be immediately reached for comment late Wednesday.
Karen Bass, a California Democratic Rep., Said she was outraged to see social media accounts of a Capitol police officer posing for a photo with a protester.
“Would you take a selfie with someone who is robbing a bank?” she said.
“I can’t imagine if a couple thousand protesters (Black Lives Matters) had descended on the Capitol … that there would be 13 people arrested.”
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Ohio Democratic Rep. Tim Ryan suggested there could be leadership changes in the Capitol Police.
“I think it is quite clear that there will be a number of people who will be unemployed very, very soon because this is a disgrace for both the mafia and the president, the insurrection and the attempted coup, but also the lack of it. professional planning and dealing with what we knew was going to happen, “Ryan said.