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Residents evacuated as Nicaragua volcano spews ash cloud

Mario Lopez / EPA

San Cristobal volcano is seen next to Chinandega, Nicaragua on Wednesday, Dec. 27, 2012. The volcano's activity is set to continue, specialists said, with gas and ash eruptions. Read the full story.

Mario Lopez / EPA

A fireman hoses down ash on a street of Chinandega, Nicaragua on Thursday.

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Some 300 families living on the flanks of the highest volcano in Nicaragua have been advised to leave after it began spewing hot gas and ash. NBCNews.com's Dara Brown reports.