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.

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 structure at South Korea's Muan airport,

The boxes holding the flight data and cockpit voice recorders for the crashed flight that left 179 people dead stopped recording four minutes before the disaster.