FileThe two back boxes on the Jeju passenger jet that crashed last month in South Korea stopped recording four minutes before the accident. That's according to a statement released on Saturday by the country’s Ministry of Transport,

The two flight recorders on board a South Korean airliner stopped working before the jet crashed during an emergency landing and subsequent crash that killed 179 of the 181 people on board, officials said Saturday.

The discovery of the missing data suggests all power may have been cut, which is rare, a former government accident investigator said.