The US Navy ended President Donald Trump's trip to Asia with a bang by having three aircraft carriers drill with South Korean and Japanese navy ships in the Pacific in a clear message to North Korea.
A North Korean soldier has defected to South Korea by crossing the Joint Security Area at the truce village of Panmunjeom.
The soldier was shot in the shoulder and elbow and taken to a South Korean hospital.
Dozens of North Korean soldiers have fled to the South through the DMZ over the decades since the peninsula was divided, including two soldiers who crossed the frontier in June.
When they meet, it is believed the South Korean and United States officials will discuss how to capitalize on the hiatus in the North's military provocations.
About 30,000 North Koreans have defected to South Korea since the end of the 1950-53 Korean War, but most travel through China. They stand only several yards away from tall South Korean soldiers wearing aviator sunglasses and standing motionless like statues.
Joseph Yun, special representative for North Korea policy, will arrive in Seoul on Tuesday to attend events by the US Embassy in Seoul, the diplomatic sources said.
Panmunjomis where an armistice was signed to pause the Korean War. "The problem is that South Korea is blindly following the USA which is intent on the scheme for a nuclear war". More than a million mines are buried inside the zone.
The North Korean ambassador accused the council of "turning a blind eye to the nuclear war exercises of the United States who is hell bent on bringing a catastrophic disaster to humanity".
An official with the South Korean Joint Chiefs of Staff said the North's border guards fired at least 40 rounds.
At the time of the defection, the soldier was clad in the Korean People's Army uniform with no weapon, he added.
In September, it carried out its sixth and largest nuclear test - of what it described as "a hydrogen bomb". The incident left three North Korean soldiers and one South Korean soldier dead.