The Sewol ferry was carrying 476 people when it capsized and sank last Wednesday. Photo: EPA

(VOVworld)- The death toll of the South Korean ferry accident mounted on Tuesday to 121. So far, 181 people remain missing and 174 people have been rescued. Rescue work has been intensive given better weather conditions and calm sea. But limited visibility under the water still causes difficulties for the rescue team. Nearly 750 divers have participated in the search and rescue campaign inside Sewol ferry. Officials said that the dining room is where most of the passengers gathered at the time of the accident.