Divers fighting strong currents have searched three compartments of a submerged South Korean ferry, but found no sign of 284 people -- most of them high school students -- still missing after the vessel sank off South Korea's southern coast Wednesday with 459 people aboard.
At least four people are confirmed dead and 55 injured.
More than 100 Navy, Coast Guard and other vessels and aircraft are engaged in the search for survivors in a broad swatch of water 12 miles off the island of Byeongpoong where the ferry went down. U.S. Navy ship Bonhomme Richard joined the rescue efforts.
Divers operating in murky, 50-degree water at a depth of at least 90 feet managed to enter the vessel, but found no survivors or bodies, according to Navy officials, the Yonghap news agency reported.
As of 7 p.m., 174 people had been rescued and 284 were still unaccounted for, The Korea Herald reported.
Two of the dead were identified as 22-year-old Park Ji-young, a staff worker for the ferry company, and Jung Cha-woong, a student at Danwon High School in Ansan, Gyeonggi Province, the newspaper said.
Ships, airplanes and helicopters buzzed around the side as the 450-foot long ferry listed and slowly sank 12 miles off the island of Byeongpoong. Rescuers pulled dazed students, many wearing life jackets,out of the 53-degree water or off the vessel.
Lee Gyeong-og, a vice minister for South Korea's Public Administration and Security Ministry, said 30 crew members, 325 high school students, 15 school teachers and 89 non-student passengers were aboard the ship.
Kang Byung-kyu, a government minister, said the two dead are a female crew member and a male believed to be a student. A third body was found in the water but details were sketchy. A coast guard officer confirmed a fourth fatality but had no immediate details about it.
Even after the ferry went down, divers continue to search for survivors who may have found pockets of air in the submerged wreckage. U.S. Navy ship Bonhomme Richard joined the rescue efforts.
One student, Lim Hyung-min, told broadcaster YTN after being rescued that he and other students jumped into the ocean wearing life jackets and then swam to a nearby rescue boat.
As the ferry was shaking and tilting, we all tripped and bumped into each another, Lim said, adding that some people were bleeding. Once he jumped, the ocean was so cold. ... I was hurrying, thinking that I wanted to live.
The Yonhap news agency, quoting government officials, says the 6,325-ton Sewol was carrying 459 people, including 325 students from a high school in Ansan, just south of Seoul, when it sent out a distress signal at 8:58 a.m.
Several survivors reported hearing a loud impact before the ship started listing and turning on its side, Reuters reports. Officials said it was not immediately clear what caused the vessel to sink.
There was a bang and then the ship suddenly tilted over, said a 57-year-old survivor, identified only by his surname Yoo, the Yonhap news agency reports. Downstairs were restaurants, shops and entertainment rooms, and those who were there are feared to have failed to escape.
The overnight ferry from Inchon was 11 hours into a 14-hour trip to the tourist island of Jeju. The ferry, built in 1994, makes the trip twice a week, the Yonhap news agency reports.
At the high school, students were sent home and parents gathered for news about the ferry.
Park Ji-hee, a first-year student, said she saw about a dozen parents crying at the school entrance and many cars and taxis gathered at the gate as she left in the morning.
In 1993, 292 people died with the Seohae ferry carrying 362 passengers sank off the southwest coast of Jeolla province.
Contributing: Associated Press