SEOUL :South Korea's industry minister said on Monday that the government had expressed concerns over Hyundai announcing multi-billion dollar U.S. investment plans at the same time as Seoul was involved in delicate trade negotiations with Washington. "We told Hyundai that (its) conduct was deeply regrettable, especially considering that our efforts have been made for the sake of Hyundai and Kia's industry," South Korea's Industry Minister Kim Jung-kwan told parliament in response to questions. "