AUSTIN, Texas — Police say five people have been arrested after chaining themselves to a tree and refusing to leave during an Occupy Austin protest.

Police Chief Art Acevedo says a sixth person chained to the tree Thursday night agreed to leave peacefully and was not detained.

Austin officials have asked protesters to move from a public plaza several nights a week, so the area can be cleaned.

Police say several who hooked themselves to a tree declined to move around 11 p.m. Thursday and were arrested on criminal trespass charges.

No injuries have been reported.