By 11:30 p.m., as police officers massed on Broadway, a commander announced that the park was closed. Those inside shouted back that the park was obliged through an agreement with the city to remain open. The commander then announced that anyone who remained inside would be arrested and charged with trespassing…

At one point, several demonstrators stood on the steep steps of Federal Hall and chanted “1-2-3-4, I declare class war.”

Later, members of the group ignored orders from the police to remain on sidewalks and flowed onto parts of Exchange Place and Beaver Street. Later, on Broad Street, a deputy inspector turned to a sergeant and said, “We got to start collaring some.”…

After nightfall, the number of people inside the park swelled to more than 500.

About 10 p.m., some of those in the park began a regimen of running and dancing that they called “spring training,” which they said was meant to prepare for coming demonstrations.