Exchange of artillery fire has raised tensions along disputed boundary.
Authorities issued a foreign travel ban for 44 executives and owners of the company that operated the ill-fated vessel.
Prosecutors issued an arrest warrant after captain was criticized for being among the first to leave the ship.
Apologized for ferry disaster that left 14 dead and 280 unaccounted for.
South Korean coastguards and navy divers resumed their search on Thursday for nearly 280 people still missing after a ferry capsized in what could be the country's worst maritime disaster in over 20 years.
China is calling for calm in the Korean peninsula after an exchange of artillery fire between North and South Korea near a maritime border.
Test comes amid ongoing annual South Korea-U.S. military drills.
Incident comes amid joint military drills between the U.S. and South Korea.
S. Koreans headed North to visit relatives they'd not seen in 60 years.
More than 100 were injured after a building collapsed at a resort.
