The "low-ranking" soldier emerged from thick fog and appeared at a checkpoint on Wednesday, reported South Korean media.
After being shot, he took cover near a building on the southern side of the JSA before South Korean and American troops came to his aid. Then in September it decided that the employment of North Korean workers abroad had to be authorized by a Security Council committee.
Another North Korean soldier has crossed the heavily fortified Demilitarized Zone that separates North and South in a dramatic escape, the second such defection in just over a month, South Korea's Defense Ministry says.
"Our military safely guided the defected solider and plans to investigate further the defection process and motivation", South Korean Joint Chiefs of Staff spokesperson Roh Jae-cheon said at a news conference.
Building on decades of tests, North Korea has made remarkable technological gains in the past year, despite diplomatic and economic isolation. It also could mean that North Korea's missile systems can afford to be significantly less accurate when used in a real-life attack because the blast itself would be so much bigger.
Later in the day, North Korean propaganda leaflets were found at Seoul's Yongsan Garrison, 8th Army spokeswoman Christina Wright told Stars and Stripes.
Yonhap says that 15 North Korean people, including four soldiers, have defected this year, up from one soldier and four civilians in 2016.
Cardinal Bernard Law, the former archbishop of Boston who died in Rome at 86, leaves a troubling legacy as a key figure in the clergy sex abuse scandal.
Shots were fired after a North Korean defector fled to the South on Thursday across the DMZ, the land border that divides the peninsula, South Korean military officials said.
The defector is the fourth to cross into South Korea so far this year.
Two bursts of gunfire were later heard in the North, the spokesman said, but there were no indications of any bullets crossing the border.
The vast majority of defectors go first to China, with which the North shares a long border, and where they face the risk of being repatriated to an uncertain fate if caught.
One option is destroying a launch site before the rogue regime uses it for a new missile test, while another is targeting weapons stockpiles, according to the news outlet.
Oh wants to become a lawyer, said his surgeon Lee Cook-Jong, who gave him a law book.
He added that the men intended to defect and agreed to abandon the aged and apparently damaged ship. "I just hope he will become a good citizen, whatever kind of occupation he chooses".