The missing data deepens the puzzle of what caused the deadly air disaster in Muan, South Korea, late last month.

Flight recorders from the passenger jet that crashed in South Korea last month, killing more than 170 people, stopped working minutes before the plane belly-landed and exploded on the runway, investigators said Saturday.

Investigators have revealed the 'black boxes' from the Jeju Air plane stopped recording four minutes before it crashed in South Korea.

Officials say the black boxes of a Boeing jetliner that crashed in South Korea last month stopped recording about four minutes before the accident.

South Korean officials sent the voice recorder to be analyzed at an NTSB lab in the US after they discovered data was missing.

According to South Korean authorities, recordings stopped on both devices approximately four minutes before the aircraft collided with a localiser structure.

Jeju Air flight 7C2216’s flight recorders have been recovered after crash that killed 179 people, but authorities say data relating to crucial 4 minutes prior to crash are missing

The black boxes holding the flight data and cockpit voice recorders for the crashed Jeju Air flight that left 179 people dead stopped recording four minutes before the disaster, South Korea's transport ministry said Saturday.

A device that could shed light on South Korea’s deadliest plane crash is missing a critical component, authorities have revealed, potentially delaying the investigation into the cause of the accident that killed 179 people.

The flight data and cockpit voice recorders on the Jeju Air jet that crashed on Dec. 29 stopped recording about four minutes before the airliner hit a concrete

The last four minutes of data before the disaster which killed 179 people are missing, transport authorities say.