Facebook says it is removing hundreds of U.S.-based pages and accounts claiming they are spreading disinformation. The social media company purged more than 500 pages and 250 accounts on Thursday for violating its rules against spam and something it is calling coordinated inauthentic behavior. The company says in a blog post that the pages and accounts that were removed were trying to exploit Facebook's algorithms to boost the reach of their content. Many of the pages billed themselves as news sources with a partisan bent. Facebook claims the move is to prevent outside forces from trying to manipulate U.S. public opinion, especially before elections.