According to the South Korean military, North Korea has violated a 2018 inter-Korean agreement that was intended to curtail tensions by firing 130 artillery rounds into the sea off both its east and west coasts Monday morning. 

North Korea allegedly detected military drills being conducted by the South.

Verbal warning communications were sent to the North Korean side, according to a statement from South Korea's Joint Chiefs of Staff.

The latest demonstration of military might from leader Kim Jong-un saw shells land in a buffer zone near the sea border, according to a report.

SOUTH KOREA SCRAMBLES JETS AS CHINA, RUSSIA WARPLANES ENTER AIR DEFENSE ZONE

KIM JONG UN'S DAUGHTER MAKES 2ND PUBLIC APPEARANCE IN DAYS, SPARKING SUCCESSION RUMORS

In the middle of November, the hermit kingdom fired a ballistic missile that splashed down in waters due east of the Korean Peninsula.

South Korea is no stranger to this sort of behavior from hostile actors.

Even more recent, South Korea was forced to scramble jets without warning after multiple Chinese warplanes (and six Russian) were found entering its air defense identification zone (KADIZ).

Reuters contributed to this report