Video source: Twitter@ElijahSchaffer Here's what we know so far: - US Congress resumes certification process after Capitol secured - Leaders, business groups condemn chaos at US Capitol (Read more) - Woman shot at US Capitol has died - Biden condemns 'insurrection' at US Capitol, as Trump urges supporters to 'go home' - Facebook joins Twitter in blocking Trump from posting following storming of US Capitol by his supporters The Capitol building was stormed by hundreds of people carrying pro-Trump signs and American flags on Wednesday, breaking into the House and Senate Chambers as Congress began counting Electoral College votes to affirm President-elect Joe Biden's victory as president. One unidentified woman, apparently a protester, was shot during the melee inside the building and later died, according to The Associated Press. It wasn't immediately known what led to her being shot or by whom. A video showed the woman draped in red, white and blue around her neck on the floor of the Capitol with blood pouring from her mouth. For a time, senators and members of the House were locked inside their respective chambers. Capitol police told lawmakers in the House to take cover on the floor and prepare to use gas masks after tear gas was dispersed in the Capitol Rotunda. Demonstrators mobbed the second floor lobby just outside the Senate chamber and police placed themselves in front of the chamber doors. Shortly later, police escorted senators and members of the House from the building to others nearby, as the protesters continued to swarm hallways just steps from where lawmakers were meeting. Supporters of US President Donald Trump cover their faces to protect from tear gas during a clash with police officers in front of the US Capitol Building in Washington, January 6, 2021. [Photo/Agencies] Armed security officials in the emptied Senate chamber stood at an entrance door with their guns aimed at a door window. Live television showed protesters fighting inside with Capitol police. Other live video showed people breaking windows and doors in an attempt to get into the building. Photos of those who got inside showed one person in the chair of House Speaker Nancy Pelosi's desk; another demonstrator took to the dais of the Senate to declare his support for Trump. "This is what you've gotten, guys," Utah Senator Mitt Romney, Republican of Utah, reportedly yelled as the chaos unfolded in the Senate chamber, an apparent reference to colleagues who were leading the day's effort to object to some states' votes in the Electoral College "This is what the president has caused today, this insurrection," Romney said later, according to The New York Times.