More news that makes things less clear.

Malaysian authorities, in the latest of a series of U-turns, reversed themselves Monday on a key detail of what happened in the cockpit of Malaysia Airlines Flight 370 in the minutes before it vanished from civilian radar nine days ago.

The government had previously said that a key satellite communications system had been disabled some time before the cockpit made final radio contact with air traffic control — and before the plane disappeared from civilian radar contact with 239 passengers and crew on board.

That sequence of events suggested that something suspicious was already underway before that final radio call was made, and that one or both pilots were either involved in a plot to commandeer the Boeing 777 or acting under duress.

But authorities acknowledged Monday that they do not know exactly when that data system went dark, making it harder to pinpoint when the suspected act of hijacking or sabotage was initiated.

The new disclosure does not change the criminal nature of the probe into the missing airliner — an investigation that now has countries from Australia to Kazakhstan scouring radar and satellite data for signs of the plane, and deploying sea and air search teams to hunt for evidence of the aircraft. It still appears likely that somebody was trying to cover their tracks as the plane was deliberately flown off-course.