Hundreds were arrested Wednesday after pro-Palestinian protests broke out on Capitol Hill, with demonstrators flooding into the Cannon House Office Building and large crowds gathering with flags and signs around the Capitol complex. The Cannon House Office Building holds several House Committee and congressional offices. By 2:30 p.m., its rotunda was full of protestors singing and chanting "ceasefire now" and "free Palestine."

U.S. Capitol Police put out an alert about the demonstrations, saying the activity was not allowed inside Congressional buildings. They worked for hours to clear the crowd that had grown inside. Police say they arrested about 500 people in total. The detained protesters were lined up outside the building and shuttled to a temporary holding area in the Capitol complex. Capitol Police say demonstrators inside the Cannon Rotunda will be charged with illegally protesting inside a House Office Building.