[metmom]

Could be, or it might be that when a fire occurs in an oxygen rich environment, it burns so violently that it seems like an explosion. Or maybe there were more than one oxygen container on board and when the heat hit them after the fire started, they ruptured.

[happinesswithoutpeace]

A fire that started from the gasoline containers could easily have generated enough heat to cause a catastrophic failure in any oxygen cylinder that was on the bus.

[happinesswithoutpeace]

Sorry, I am half awake..I should have been talking about diesal fuel tanks.