A man who covered his face with a grey hoodie as he briefly appeared on television has been identified by broadcaster YTN and Yonhap news agency as the captain of the South Korean ferry's which sank.
As he was being questioned at the Mokpo Coast Guard Office, he said: "I am really sorry and deeply ashamed."
Nine people, including five students and two teachers, were confirmed dead, but many expect a sharp jump in that number because of the long period of time the missing have now spent either trapped in the ferry or in the cold seawater.
Dozens were injured, while 179 survivors have been rescued so far.
More top news
A shock to the system
We found a tableau of desperation; vast crowds of people pushing and shoving their way forward, away from the continuing bombardment.
Cambridge Analytica played a key role in mapping behaviour of voters in the US election and was used during the EU referendum campaign.