The barricades were removed late Tuesday. About 300 cheering protesters began filling the park.
By 8:30 a.m, about 10 remained.
Protester Chris O'Donnell says three people were arrested for lying down. The NYPD charged two people with resisting arrest and trespassing and one for trespassing.
Sleeping, tents and sleeping bags have been banned from the park since a Nov. 15 police raid evicted protesters.
On Monday, civil rights groups filed a complaint with the city's buildings department saying the barricades were a violation of city zoning law.
Zuccotti Park is a publicly owned private plaza and is required to be open 24 hours a day.
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