The BBC has a <a href="http://news.bbc.co.uk/2/hi/europe/7828709.stm" rel="nofollow">piece</a> that gives a little more context (and the reason why the police charged both the rioters and the peaceful protesters). You can find a lot of photos and some videos collected <a href="http://www.bogomil.info/2126/" rel="nofollow">here</a> (the links under the pictures lead to galleries).