"Seven people died in Korea."
Translation:일곱 명의 사람들이 한국에서 사망했습니다.
사망하다 is the equivalent of the English expression "to lose one's life"
죽다 is the exact interpretation of "to die"
Their usage is similar to the English expressions.
And like with English, Koreans have a variety of impact verbs for to die. (to succumb, to perish, to pass on, etc.)