North, South Korea Trade Fire Across DMZ Border; No Known Casualties

A recent exchange of fire occurred in the heavily fortified Demilitarized Zone (DMZ) between North and South Korea. North Korean troops reportedly fired at a South Korean outpost, prompting South Korean soldiers to respond with warning shots and a broadcast. No casualties were reported, and the shots were fired into unoccupied land. North Korea has not commented on the incident. Historically, the DMZ has seen similar exchanges, including a defection in 2017 and balloon incidents in 2014. The cause of the recent exchange remains unknown.

What was the outcome of the North Korean soldier's defection in 2017?

What is still unknown about the recent exchange of fire?