The crew of a South Korean ferry that sank with hundreds of people on board repeatedly asked officers on the bridge whether or not to give the order to abandon ship, but there was no response, a crew member has said.

The Sewol ferry sank last Wednesday on a routine trip south from the port of Incheon to the subtropical holiday island of Jeju. The death toll stood at 104 on Tuesday, media reported.

Of the 476 passengers and crew on board, 339 were children and teachers on a high school outing. Only 174 people have been rescued and the remainder are all presumed to have drowned.