Dowsers in South Korea

It’s offhandedly mentioned but Gen. Hahn Sung-Chu a retired two-star general from South Korean Army says “dowsers detected three tunnels, 13 to 16 feet (4 to 5 meters) wide at a depth of up to 39 feet (12 meters).”

I haven’t been able to find more on this story yet concerning the dowsers themselves, but still looking.

Is North Korea still digging tunnels to the South? – CNN.com.