The investigation into a Jeju Air crash in South Korea has found both engines on the plane sustained bird strikes but the pilots turned off a less-damaged one just before its crash-landing.

The interim findings, based on cockpit voice recordings, flight data and wreckage analysis, showed the flight crew mistakenly switched off the less-damaged left engine rather than the right engine that had suffered the bird strike.

The families accused investigators of pinning the blame on the pilot while ignoring other factors into the crash in South Korea.