Ex - S. Korean general suspects a North Korean tunnel is under a Seoul apartment complex . The tunnels are connected to the sewers linked to the relevant organizations . '' But the Korean Defense Ministry believes tunnels ca n't exist beyond 6 km from the city . A source says tunnel operations began in the 1980s .
Ex - S. Korean general suspects a North Korean tunnel is under a Seoul apartment complex . But the Korean Defense Ministry believes tunnels ca n't exist beyond 6 km from the city . A source says tunnel operations began in the 1980s .