Police announced Zuccotti Park closed for the evening Saturday after protesters spent the day celebrating a six-month anniversary, chanting, cheering and marching down Wall Street before returning to the park.
More than 100 officers pushed through the park crowd. Many protesters shouted and officers took out their batons after a demonstrator threw a glass bottle at a bus that police were using to detain more than a dozen protesters.
At least two people were loaded into ambulances.
