Incident
Shortly after takeoff from Gangneung to Seoul, a man entered the cockpit and hijacked the aircraft, demanding the crew divert to North Korea. As the flight approached the border, the crew descended to a low altitude in an attempt to land on a beach. During the descent, the hijacker unpinned a grenade, which exploded inside the cockpit.
Aftermath
The explosion killed both the hijacker and the copilot. The captain sustained injuries but remained in control of the aircraft. Electing to land on a beach, the captain executed a crash landing; the aircraft skidded to a stop. Sixteen occupants were injured, while 42 others were unhurt. The aircraft was damaged beyond repair.
Probable Cause
The official probable cause of the accident is: Hijacked and crashed.