Goyang Geumjeong Cave massacre
The Goyang Geumjeong Cave massacre (Korean: 고양 금정굴 민간인 학살; Hanja: 高陽衿井窟民間人虐殺; lit. 'Goyang Geunjeong Cave civilian massacre') was a war crime of 153 unarmed civilians conducted between 9 October 1950 and 31 October 1950 by police at the site of a former gold mine in Goyang, Gyeonggi-do district of South Korea.
Source: Wikipedia — Goyang Geumjeong Cave massacre (CC BY-SA 4.0)