Yes Mayor Menino had said that the time would come soon perhaps when the demonstrators would be asked to leave.
The Boston Herald which said 50 were arrested said that
$150,000 had been spent for shrubs on the Rose Kennedy
Greenway and there was concern they might be damaged
A respectful tweet from Boston Police 9 hrs ago
Boston_Police Boston Police Dept.
@Occupy_Boston Please ask your group to return to original site where you can continue your peaceful protest. Thank you.