A total of 108 people are now confirmed dead following the South Korean ferry last week as divers continue to recover bodies from the stricken vessel.
More than 190 people are still missing following the disaster, with many presumed to be trapped in the sunken hull of the ferry.
It is not yet clear what caused the accident, which saw the ferry capsize and sink in under two hours.
Korean officials have been highly critical of the crew on board, with evacuation of passengers delayed and a failure to use all lifeboats among concerns raised.
Five members of the crew have been charged with not fulfilling their duty to evacuate passengers safely.
A total of 174 passengers were rescued from the Sewol, which capsized as it sailed from Incheon in the north-west to the southern island of Jeju.
However, only two of more than 40 lifeboats are believed to have been deployed.
There were up to 30 crew members on the stricken ship, reports say, and some seven of them are missing.
Many were trapped inside the ship as it listed to one side and then sank.