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 said Saturday, possibly complicating investigations into the cause of the disaster that killed 179 people.

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,

South Korean investigators previously said the flight data and cockpit voice recorders were key to finding out the cause of last month’s crash that killed 179 people