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.

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

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 police has questioned the chief of the presidential security service as the two agencies clashed over attempts to detain impeached President Yoon Suk Yeol.

South Korea's Presidential Security Service chief resigned Friday and acting President Choi Sang-mok accepted it. President Yoon Suk Yeol remains in his fortified residence as law enforcement seeks to arrest him.

The security chief of impeached South Korean President Yoon Suk Yeol, under investigation for blocking Yoon's arrest, resigned on Friday and said any further efforts to detain the ex-leader must avoid bloodshed.