Scores of students rallied at the University of California, Berkeley, on Tuesday as part of a day-long strike protesting the campus arrests of 39 people last week. Student activists have erected a new encampment after the first was dismantled during last week’s crackdown. Police have now given them a new order to disperse. A few hundred people from Occupy Oakland took part in a five-mile march to join up with the students. The campus received a scare after police shot a man who a brandished a gun in a computer lab, though police say the incident was unrelated to the protest. Just miles away, there are fears of a new raid on Occupy San Francisco after a battalion of riot police surrounded the downtown encampment. San Francisco police say they do not plan to clear the main camp but have arrested seven people who set up tents on a sidewalk.