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Berkeley officials warned students and residents to “keep a distance from violence” Thursday as police prepared for clashes between supporters and opponents of conservative commentator Ann Coulter, who had been scheduled to speak to two UC Berkeley student groups about immigration policy this week before her appearance was canceled.

“If you are at a demonstration and you see violence, separate yourself. Keep a distance from violence,” Chancellor Nicholas Dirks and Mayor Jesse Arreguín said in a joint statement Thursday morning.