MOKPO, South Korea (AP) — Strong currents, rain and bad visibility hampered an increasingly anxious search Thursday for 287 passengers still missing a day after their ferry flipped onto its side and sank in cold waters off the southern coast of South Korea.

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. There was also fury among families waiting for word of passengers who were mostly high school students.