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Clean up begins after powerful California earthquake

A major clean up operation has begun in northern California after it was struck by a powerful 6.1 magnitude earthquake.

Dozens of people were injured, two of them seriously and buildings were damaged after the earthquake hit the city of Napa.

California governor Jerry Brown also declared a state of emergency after water mains were damaged and gas leaks reported.

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Photos appear to show buildings damaged in quake

A Twitter user took this photo that purports to show serious damage to a building in Napa - a city around three miles (5km) from the epicentre of the earthquake.

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