South Korean president Park Geun-Hye says the behaviour of the captain and crew of the Sewol ferry that capsized five days ago with 476 people on board was unacceptable and "tantamount to murder".
Captain Lee Joon-Seok has been arrested on five charges, including negligence of duty and abandoning people in need.
"This is utterly unimaginable, legally and ethically," said the president, who was heckled last week as she met relatives of the missing passengers.
The death toll from the ferry disaster stands at 64, but 238 people are still missing, presumed dead.
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