Six fishermen died overnight after jumping intoice-cold water from their burning trawler off South Korea, dpa cited the coastguard as saying Monday.Two members of the South Korean boat's crew were rescued and one other was missing,The boat caught fire around 108 kilometres south-west of the southernisland of Cheju and sank several hours later.The six men most likely died of hypothermia, the Yonhap News Agencycited a coast guard official as saying.