Seoul: Last week, on February 16, South Korea's military had announced that it had captured a man from North Korea in the Demilitarised Zone (DMZ) which separates the two countries. The North Korean man was taken in at about 7:27 am close to a checkpoint at the eastern end of DMZ, nearly three hours after he was spotted at around 4:16 am.The South Korean Joint Chiefs of Staff (JCS) had then issued a statement: “He is presumed to be a North Korean and we’re conducting an investigation into details, including how he had come down and whether he wished to defect.”DMZ, the border that separates the two rival Koreas, is heavily fortified and sensor dominated. Now, some shocking details have emerged as to how the man crossed the heavily-fortified border and how the South Korean forces even failed to spot him for hours, leave alone capturing him.A report in the BBC said the South Korean military had failed to spot the North Korean for hours despite the fact that he appeared on security cameras eight times and triggered alarms.It has been learned that the man used the sea route to enter DMZ and appeared ashore in a wet suit. He was able to walk for five kilometres and wander unnoticed for almost three hours. It was when he was seen on TV cameras the ninth time that he was detected and arrested by the South Korean troops following a three-hour search.The Yonhap news agency reported that the man even used a drainage tunnel in the DMZ about whose existence the South Korean military was not even aware of.A report by the South Korean JCS has found that the man, whose identity has not been revealed, had come ashore at about 01:05 am in a wet suit and flippers.After being first detected at 04:16 am, he was finally taken into custody by the troops at 07:27 am.Between all this, he had walked along barbed wire fences, passed through the drainage tunnel to enter DMZ, and moved along a road for over five kilometres.Following the security lapses in this case, a probe has started into the 22nd Division which manages security in the concerned area of DMZ.