Protester and tear gas
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Occupy protests: US police fire tear gas at demonstrators

Police have used tear gas to disperse anti-capitalism protesters in Oakland, California.

Hundreds of people were driven from the 'Occupy Wall Street' camp in Frank Ogawa Plaza after police declared it an 'illegal assembly'.

Interim Police Chief Howard Jordan said the use of gas was "necessary to protect officers and property".

Rebecca Barry reports.

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