Towing With Refrigerator On Propane

It was being towed but parked at the time. I don't think they know what caused the explosion except it was a gas leak that was ignighted in some way. The RV was in poor condition and the occupants were across the street (luckily) when it blew... Explosion blew out it's own fire. Just got me thinking about leaving the gas on at all till you get where your going when you may be able to actually smell the gas leak or hear your detector if it goes off.