Secret tunnel under Panmunjom : North Korea's third invasion passage
discovered. (Seoul, Korea : published by Korean Overseas Information
Service, 1978)
During the 1970s three North Korean tunnels were discovered beneath the
Demilitarised Zone. These had apparently been dug to enable invasion forces to
surface behind the lines of the UN troops guarding the DMZ. This booklet gives
details of all three tunnels and of an attack by North Korean soldiers, armed
with axes against UN troops near Panmunjom.