. >> reporter: the other night -- they tried to show them some pellet kraig debro ktvu channel 2 news. >>> last night hundreds marched from their encampment to the steps of city hall and at one point they shall clashed with no, city police. there were a few minor injuries. >>> at one point they started to a downtown bart station. our ktvu channel 2 news examine was there during last night's tense confrontation as the protesters try to enter. they talked about the deadly shootings involving police and they are looking at how it is affecting service or any other part of the commute this morning. >>> they are determined to hold their ground and they have been camped outside city hall there. now we have been watching one protester perched on top of that wall, and they say they are trying to balance free speech rights through protected space. >>> the mayor was out of down during the violent clashes between police and occupied protesters but coming up, we hear the mayor explain why she was not there and think the critics so say she was not there. >>> the oakland school board has decided to