People wearing masks evacuate due to volcanic eruption of Mount Sinabung at Sibintun village in Karo district of Indonesia's North Sumatra province, April 3, 2015. Mount Sinabung volcano in Karo district of Indonesia's North Sumatra province erupted on Thursday afternoon, spewing a column of ash by up to 2 km to the sky and triggering small-scale evacuation, official said here earlier Friday. Photo: Xinhua

Houses are seen destroyed due to volcanic eruption of Mount Sinabung at Sibintun village in Karo district of Indonesia's North Sumatra province, April 3, 2015. Mount Sinabung volcano in Karo district of Indonesia's North Sumatra province erupted on Thursday afternoon, spewing a column of ash by up to 2 km to the sky and triggering small-scale evacuation, official said here earlier Friday. Photo: Xinhua