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Occupy Oakland protesters claim a vacant building during a march on Wednesday, Nov. 2, 2011, in Oakland, Calif. Thousands of anti-Wall Street protesters took to Oakland's streets as part of a day-long series of events, called a citywide strike, aimed at asserting the movement's strength and shutting down commerce. (AP Photo/Noah Berger)

Scores arrested in Oakland, agitators blamed

Police arrested more than 80 demonstrators early on Thursday in overnight clashes that activists and Oakland city officials alike blamed on agitators who provoked unrest following a day of mostly peaceful rallies against economic inequality.