A woman carrying her child walks on the street at the district of Tanah Karo outside the city of Medan, North Sumatra, as Mount Sinabung volcano spews smoke in the background August 28, 2010. (REUTERS/Tarmizy Harva)

A volcano erupted on the Indonesia island of Sumatra on Sunday for the first time in four centuries, sending smoke 1,500 meters (about 5,000 feet) into the air and prompting the evacuation of thousands of residents, officials said.

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