Brazilian authorities are investigating the cause of a plane crash in Sao Paulo state that killed all 61 people on board.The plane of local airline Voepass, an ATR 72 twin-engine turboprop, was headed for Sao Paulo's international airport in Guarulhos with 57 passengers and four crew when it went down in the city of Vinhedo on Friday.

Brazilian authorities are investigating the cause of a plane crash in Sao Paulo state that killed all 61 people on board.The plane of local airline Voepass, an ATR 72 twin-engine turboprop, was headed for Sao Paulo's international airport in Guarulhos with 57 passengers and four crew when it went down in the city of Vinhedo on Friday.