It was being reported, initially, that a crew member had blamed the fire on an electric vehicle aboard and that the crew had tried to extinguish it. That "report" seem to have disappeared from all subsequent updates. The news agencies wouldn't suppress that info if put under pressure by the powers that be I suppose. A very valuable export source for German cars would be in jeopardy if potential customers were alerted. Petrol vehicle fires are always caused by either accident damage, poor maintenance, pure stupidity, overloading, or overheating due to a fault. Electric vehicle fires can start spontaneously due to the inherent built in characteristics of the batteries themselves. An unpredictable chemical reaction in the batteries themselves can cause thermal runaway which causes overheating and intense internal pressure in the battery. The size of the batteries makes it nigh on impossible to bring the ensuing blaze under control.