The head of the charter airline whose plane crashed in the Andes last week was detained by Bolivian prosecutors for questioning as authorities look into whether the tragedy that killed 71 people stemmed from negligence.

Gustavo Vargas, a retired Bolivian air force general, was picked up in Santa Cruz along with a mechanic and secretary who worked for him at LaMia airline. All are being questioned about their roles in letting a British-built short-range jet attempt a more than four-hour flight from Santa Cruz to Medellin, Colombia, for which it barely had enough fuel in violation of aviation norms.