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Earl strengthens again to Category 4 hurricane

01/09/2010 - 21:38

MIAMI (Reuters) - Hurricane Earl strengthened again into a powerful Category 4 storm on Wednesday as it headed for the North Carolina coast on the U.S. eastern seaboard, the U.S. National Hurricane Centre said.

A hurricane watch was extended northwards from North Carolina up to Massachusetts, including popular resorts like Martha's Vineyard and Nantucket, the Miami-based centre said.