ROUGH CUT (NO REPORTER NARRATION)<br/> <br />Hundreds of people had to be evacuated after Indonesia's Mount Sinabung volcano erupted on Tuesday for the third time in as many months.<br/> <br />Displaced villagers watched nervously from temporary shelters as columns of ash shot up in the air.<br/> <br />Authorities imposed a 3-km evacuation radius after the volcano, which sits on the western island of Sumatra, spewed a 7-km (4.3-mile) column of ash on Sunday.<br/> <br />The military helped evacuate 1,293 people from four villages around the volcano, which is 88 km from the provincial capital, Medan. The number of evacuees was expected to rise.<br/> <br />No casualties were reported.<br/> <br />About 14,000 people were forced the evacuate when the volcano showed signs of activity in September. Sinabung is one of nearly 130 active volcanoes in the world's fourth-most populated country, which straddles the "Pacific Ring of Fire".<br/> <br />The most deadly volcanic eruption in recent years was of Mount Merapi, near the dens