Rescue workers sifted through smoldering debris and thick mud Tuesday in search of survivors, a day after a volcano on Indonesia’s island of Flores erupted and killed at least nine people with its searing lava and ash.

Mount Lewotobi Laki Laki spewed thick brownish ash as high as 2,000 meters (6,500 feet) into the air and threw lava, gravel and ash up to seven kilometers (4.3 miles) from its crater, blanketing nearby communities with tons of volcanic debris and forcing residents to flee.