U.S. Park Police took down three tents Thursday afternoon in McPherson Square, where Occupy D.C. protesters have been living since last fall.

Park Police took down tents in McPherson Square, loading their contents into a pickup truck. (Katie Rogers/The Washington Post)

David Schlosser, a spokesman for the U.S. Park Police, said that some belongings were removed from the square as part of ongoing “standard enforcement” of no-camping rules. One person was arrested, he added.

Police asked protesters to remove a one-person tent, which the protesters agreed to.

Several protesters said they did not know why the tents were taken down, and had no prior warning.

Last month, 11 protesters were arrested in a pre-dawn raid in which police cleared away tents, bedding, trash and dead rodents.