The death toll in the eruption of a volcano in western Indonesia rose to seven on Sunday, with two other people in critical condition, as an official warned of more eruptions.

Mount Sinabung in North Sumatra province blasted volcanic ash as high as 3 kilometers into the sky on Saturday, said National Disaster Management Agency spokesman Sutopo Purwo Nugroho. He said ash tumbled down the slopes as far as 4.5 kilometers westward into a river.

All the victims of the eruption were working on their farms in the village of Gamber, about 4 kilometers away from the slope, or within the danger area.