경찰은 사고 직후 펜션 주변의 CCTV 분석 결과 외부인 출입은 없었고, 사고가 난 객실 가스보일러 배기관은 분리된 채 발견됐다고 밝혔다.
The police said that after analyzing the CCTV in surrounding of the pension after accident, it revealed that no outsiders had entered, and the cabin gas boiler exhaust pipe in where accident has occurred was found separated.