About a dozen activists who stayed awake all night at Zuccotti Park have been trying to fend off bad behavior.
At daybreak Wednesday, protesters called for police when a man started throwing punches.
Officers moved in and arrested a man who had tried to intervene.
A short time later, protesters banished a man from the park who was arrested last week for indecent exposure. It wasn't immediately clear if he was re-arrested.
A judge ruled Tuesday that the protesters could return to Zuccotti Park. But they can't sleep there, and they can't set up tents, sleeping bags or tarps.