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.

Air India CEO Campbell Wilson said the Aircraft Accident Investigation Bureau’s (AAIB) preliminary report found “no mechanical or maintenance issues with the aircraft or engine,” reported Hindustan Times. Urging caution, he noted the report identified no cause nor made any recommendations and asked everyone to avoid “drawing premature conclusions.”