Protesters chain themselves together outside the security gates of Downing Street in London, Wednesday March 23, 2011, in a protest to stop Chancellor George Osborne leaving Downing Street to the House of Common to present his annual Budget. (AP Photo/Sang Tan)
March 26, 2011 8:37:30 AM PDT
LONDON (AP) -March 26, 2011 --
Police say protesters have thrown paint bombs and light bulbs filled with ammonia at officers in London's center during a demonstration against budget cuts.