Well, this would be strong evidence for the “water attack” theory:
North Korea may have disabled alert systems that monitor water levels before it opened floodgates on Sept. 6, killing six South Korean campers, the Korea Economic Daily said, citing unidentified government officials.
Four automatic alert systems near South Korea’s Imjin river weren’t working three hours before North Korea opened the floodgates to one of its dams, the Korean-language newspaper said. South Korea’s National Intelligence Service is investigating the matter, according to the report. [Bloomberg, Kevin Cho]