The wounded soldier was evacuated from the site for emergency medical attention, the statement said, after defecting from a North Korean guard post at the Joint Security Area (JSA) on the heavily-guarded border between the two countries.
The soldier is reported to have left the North Korean guard post in front of Panmungak, on the border inside the demilitarized zone, and proceeded to move towards Freedom House on the South Korean side.
It is the third defection by a member of the North Korean military this year, following two soldiers who fled to South Korea separately in June.
Prior to 2017, there had only been four military defectors from North Korea over the past five years: one in 2016, one in 2015 and two in 2012.
Robert Kelly, associate professor at the Department of Political Science at Pusan National University, said the prominent defection and the shooting was “genuinely surprising.”
“It’s fairly unusual, I can’t think of the last time (a defector was shot at) … it certainly adds to the tensions,” he said.
The defector is currently in South Korean military custody, according to the statement.
“Our military has raised the alert level in anticipation of North Korean provocation. The military is maintaining a full readiness,” the Joint Chiefs of Staff statement said.