The rallies, which began 16 days ago with a goal of occupying Wall Street for months, spread to cities including Los Angeles and Boston, where 25 people were arrested Sept. 30 after police said they refused to leave the lobby of a Bank of America Corp. building. The next day, New York City police halted a march over the Brooklyn Bridge and took hundreds of activists into custody for blocking traffic. Some people arrested claimed officers had tricked them into leaving the pedestrian walkway.