A new report suggests the co-pilot officer on the doomed Air India flight thought the captain may have turned off the plane’s fuel switches shortly before the fatal crash.

Fuel control switches for the engines of an Air India flight that crashed last month were moved from the “run” to the “cutoff” position moments before impact, starving both engines of fuel, a preliminary investigation report said early Saturday.

An investigation into the Air India Dreamliner that crashed last month and left 260 people dead has revealed a mysterious audio recording.