Lee Joon-Seok (C), captain of the South Korean ferry "Sewol" which sank at sea off Jindo, is investigated at Mokpo police station in Mokpo April 17, 2014. Rescuers were hammering on the upturned hull of the capsized South Korea ferry on Thursday hoping for a response from hundreds of people, mostly teenage schoolchildren, believed trapped after the vessel started sinking more than 24 hours previously. [Photo/Agencies]

Prosecutors say they've asked a court to issue an arrest warrant for the captain of the South Korean ferry that sank two days ago, leaving hundreds missing and feared dead.

Prosecutors said Friday that they have also requested arrest warrants for two other crewmembers.

The investigation into the ferry disaster has focused on the sharp turn it took just before it started listing and whether a quicker evacuation order by the captain could have saved lives. Investigators are also determining whether the captain abandoned the ship.

Rescuers are struggling to find about 270 people still missing and feared dead.

At least 28 bodies have been recovered. Officials said there were 179 survivors and about 270 people remain missing, many of them high school students.