On the pretext of clearing a path for sweeper trucks, the police in Barcelona charged into group of protesters wielding blunt objects and firing rubber bullets. About 60 were injured.
Here's a link to the graphic video:
http://www.elpais.com/videos/espana/Brutalidad/desalojar/Plaza/Catalunya/elpvidnac/20110527elpepunac_3/Ves/