this happened at #occupyoakland last night

At around 9:30 p.m., there was a tense faceoff between protesters and police officers on Broadway at 14th Street. About 100 officers, some appearing to be sheriff’s deputies, stood behind a metal barricade in full riot gear and wearing gas masks, while on the other side people pressed against the barricade, waving peace signs and chanting slogans. A few protesters hurled objects — what looked like water bottles — at the police, while over a loud speaker, officers instructed people to disperse or risk “chemical agents.”
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Shortly after 9:30 p.m. the announcements stopped. Moments later, the police began firing canisters of tear gas into the crowd. Many people ran, but a few protesters wearing gas masks stayed and continued to throw things at the police. Those who had been affected by the gas coughed repeatedly and appeared to weep. Some stooped before a woman who volunteered to rinse reddened eyes. (via)