The police set up a road block at Fifth Street, the "west" end of the red circle. An eye witness reports police vehicles drove through the crosswalk at Market and Fifth and riot club-armed officers jumped out and started smashing the legs of cyclists in their path without warning or provocation. Note: the assaults took place throughout the entire length and breadth of Market between Fifth and Fourth Streets. The shots we have (still 1 and video 1) captured only a relatively tiny slice of the riot. Eye witnesses are filling in the gaps and we are in search of additional photos.