Rescue personnel surveying a crashed UH-1H military helicopter in a field in Chuncheon, in South Korea's north-eastern Gangwon province. The crash of the South Korean military helicopter yesterday killed three crew members and left one seriously injured. The helicopter went down next to its base in Gangwon province in the morning while on a routine test flight, the Yonhap news agency reported, citing police and fire officials. All four crew members were rushed to a nearby hospital, where three were later pronounced dead. The 50-year-old pilot survived but was in a critical condition. The precise cause of the crash was not immediately known.