GOMA—A smoking trail of lava from a volcanic eruption covered hundreds of houses in eastern Congo on Sunday, leaving residents to pick gingerly through the wreckage for belongings and loved ones, though the flow halted just short of the city of Goma. Goma was thrown into panic on Saturday evening as Mount Nyiragongo, one of the world’s most active and dangerous volcanoes, erupted, turning the night sky an eerie red and sending a wall of orange lava downhill towards the lakeside city of about 2 million people. Army spokesman Guillaume Njike said 13 were killed fleeing the disaster, including nine in a traffic accident and four who tried to escape Munzenze prison in Goma. That figure will likely rise considerably. A Reuters reporter saw two people killed by the initial eruption in a village north of Goma, and witnesses spoke of dead and missing relatives. Haunted by memories of an …