 During the killings , the 2nd Battalion came under sporadic artillery and mortar fire from the North Koreans , who advanced cautiously from Yongdong . Declassified Army intelligence reports showed that the enemy front line was two miles or more from No Gun Ri late on July 28 , the third day of the massacre . That night , the 7th Cavalry messaged division headquarters , " No important contact has been reported by our 2nd Battalion . " Unit documents never reported the refugee killings . In the predawn hours of July 29 , the 7th Cavalry Regiment withdrew from No Gun Ri . That afternoon , North Korean soldiers arrived outside the tunnels and helped those still alive , about two dozen , mostly children , feeding them and sending them back toward their villages . 
