By Ricardo Brito, Luciana Magalhaes and Luana Maria Benedito BRASILIA/SAO PAULO (Reuters) -A preliminary report into the August crash of an airliner in Brazil found signs of ice buildup on the plane but no definite cause for the accident,

Investigators have released preliminary information on the still-mysterious crash of a Voepass airliner that killed all 62 on board in Brazil this summer.

Audio from the cockpit’s voice recorder included comments from pilots indicating ice was accumulating and there was a failure in the de-icing system, Paulo Froes, an investigator in the air force’s centre for the investigation and prevention of air accidents, told reporters in Brasilia.