Occupy Wall Street protesters have been ordered to leave Zuccotti Park, their longtime encampment in Lower Manhattan but they've been told they can return once it has been cleaned.

At about 1 a.m. Tuesday, police handed out notices from the park's owner, Brookfield Office Properties, and the city saying that the park had to be cleared because it had become unsanitary and hazardous. Protesters were told they could return, but without sleeping bags, tarps or tents.

Paul Browne, a spokesman for the New York Police Department, says most people began filing out of the park once they received the notices; one person was arrested for disorderly conduct. Brown says the park was not heavily populated Tuesday morning.