watched video, can confirm that IEDs (Improvised explosive devices) were in the boot of the subaru. They were 5 litre red plastic fuel containers.
at what point did I say there was gasoline in them?
he grabbed it when he went to the car (after shooting up the mosque), but then left it behind when he back in to the mosque and shot the bodies (again). I assume that the purpose of going back to the car was to grab the fuel containers (containing whatever was in them) and cause an explosion or burn down the mosque, but in the heat of it all he got confused when changing firearms and forgot it so just re-shot the bodies