SEOUL, April 17 -- Search for some 290 people, mostly teenage schoolchildren, who are still missing after a ferry capsized off South Korea's southwest coast, continued into the second the day on Thursday.

Divers tried five times overnight to make their way into the submerged hull to search for those missing, but rapid currents and low underwater visibility hampered their rescue operations, said Kang Byung-kyu, minister of security and public administration, who is coordinating the rescue efforts.

The ship sank at a depth of 30 meters, where the ocean currents flowed at a speed of 8 km per hour. Waves were half a meter high. Water temperature was 11.7 degrees Celsius, under which conditions a human body can endure only one or two hours.

The U.S. Seventh Fleet has sent its amphibious assault ship USS Bonhomme Richard, which has helicopters on board and was on a routine patrol off South Korea's west coast, to the scene at the request of the South Korean military.

GRIEVING FAMILY MEMBERS

Of the 475 people aboard ferry "Sewol," at least nine people have been confirmed dead as of 11 a.m. local time Thursday, including a crew member, five high school students, two teachers and a passenger, while 179 people were rescued.

The passengers aboard the sunken vessel included 325 students from Danwon High School in Ansan city and 15 teachers who had been on the way for a four-day field trip. The ship departed from South Korea's western port city of Incheon Tuesday night for the southern resort island of Jeju.

The Chinese embassy here confirmed Thursday that two Chinese citizens, one male and the other female, were aboard the ill-fated ship.

The death toll was expected to rise dramatically, with the missing believed to be trapped inside the sunken vessel.

Anxious and heart-broken family members of the victims are gathering at a gym on Jindo island, with a one-meter-high board carrying survivors list standing by the entrance. Relatives of those who remained missing started wailing and soothed each other in tearful hugs.

The mother of a high school student could not hold back her tears of relief when she found her son's name on the list.

Some have showed their last communication messages from people on the sunken ship.

"Mother, it may be my last chance to say I love you," read one message. "Please forgive me if I have ever done something wrong," another one said.

Many have grown furious, blaming the government for a lack of information and what they described as a slow reaction to probably South Korea's worst maritime accident in 20 years.

A TV footage showed the angry crowd yelled and poured water at Prime Minister Chung Hong-won when he visited the shelter. Some blamed the government for not sending enough divers.

Many people were so worried that they could not stay indoors and rushed to Jindo harbor, wrapped in blankets against the spring cold. Some even hired their own boat and decided to take a reporter or a diver to the rescue scene.