North Korea has attached GPS devices to some of the trash balloons it has been launching into South Korea, the ROK military announced on Sunday, a move that one expert said may seek to verify that the balloons are reaching their intended targets.

In a statement, South Korea’s Joint Chiefs of Staff (JCS) assessed that the DPRK is “gaining experience by attaching GPS devices to some of the balloons they send up.”

“However, there are limitations in overcoming weather conditions such as wind direction,” it added. 

“Our military is monitoring the potential development of North Korea’s balloon launching technology alongside