South Korea plane crash investigations focus on role of airport embankment

Jeju Air flight burst into flames when it hit barrier at end of runway after crash-landing at Muan international

South Korean authorities seeking answers to the country's deadliest plane disaster are investigating the role of a hardened barrier at the end of a runway that was hit after the jet crash-landed on Sunday.

The structure may only partly explain the sequence of events that led Sunday's Jeju Air flight to end in such a violent manner.