Rescuers fought rising winds, strong waves and murky waters on Thursday as they searched for hundreds of people, mostly teenage schoolchildren, still missing after a South Korean ferry capsized more than 24 hours ago, Reuters reported. Coastguard, navy and some private divers were operating in waters at the site of the accident, about 20 km (12 miles) off the country's southwestern coast. Earlier, rescue teams hammered on the hull of the upturned vessel, hoping for a response from anyone trapped inside, but did not hear anything, media reports said. The vessel, carrying 475 passengers and crew, capsized on Wednesday during a journey from the port of Incheon to the holiday island of Jeju. Nine people were found dead and 179 had been rescued, according to the South Korean government, leaving 287 unaccounted for and possibly still trapped in the vessel.