Oakland police used tear gas and "flash" grenades Saturday to break up hundreds of Occupy protesters after some demonstrators started throwing rocks and flares at officers and tearing down fencing.
Three officers were hurt and 19 people were arrested, the Oakland Police Department said in a release. No details on the officers' injuries were released.
Police said the group started assembling at a downtown plaza Saturday morning, with demonstrators threatening to take over the vacant Henry Kaiser Convention Center.
The group then marched through the streets, disrupting traffic.
The crowd grew as the day wore on, with afternoon estimates ranging from about 1,000 to 2,000 people.
The protesters walked to the vacant convention center, where some started tearing down perimeter fencing and "destroying construction equipment" shortly before 3 p.m., t
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