NEW : South Korean President Park Geun-hye expresses condolences to victims ' families . More than 100 people are injured , two of them seriously . For hours , South Korea 's Yonhap news agency reported that people were trapped as rescuers rushed to the resort building in the southern city of Gyeongju . The attack happened at a crowded market in the city of Ansan, about 50 km from Seoul. A resort building in the city of Gyeongju collapsed , South Korean news agency says .
NEW : South Korean President Park Geun-hye expresses condolences to victims ' families . More than 100 people are injured , two of them seriously . The attack happened at a crowded market in the city of Ansan, about 50 km from Seoul. A resort building in the city of Gyeongju collapsed , South Korean news agency says .