A damaged Hong-Kong-registered oil tanker is seen as the tanker spills oil after an accident on the sea in Taean, about 170km (106 miles) southwest of Seoul, December 8, 2007. South Korean workers using skimmers and containment fences battled on Saturday to clean up the worst oil spill in the country's history, as part of the slick hit shore near a nature preserve on the west coast. [Agencies]