A private jet crashed into military housing in San Diego during foggy weather early Thursday, igniting cars parked along a suburban neighbourhood block and killing multiple people on board the plane, authorities said. The plane could hold eight to 10 people but it’s not yet known how many were on the aircraft, Assistant San Diego Fire Chief Dan Eddy said at a news conference. Authorities will be investigating whether the plane hit a power line, he said. The aircraft crashed just before 4 a.m. into the U.S. military’s largest housing neighbourhood.