Matthew Sanchez......North Korea fires "warning shots"

South Korea's military has fired warning shots at North Korean guards searching for a soldier who defected early morning.
The North Korean soldier had walked across the Demilitarized Zone (DMZ) shortly after 08:00 (23:00 Wednesday).
He had emerged from thick fog at a checkpoint, said the South's military.
He is the fourth North Korean soldier to defect this year. The incident comes weeks after one of the most dramatic defections in recent times.
In that incident, on 13 November, a soldier was shot as he fled across to the southern side of the Joint Security Area (JSA) in the village of Panmunjom.