Glorietta explosion

Was it really the gas tank which exploded that night or was it a bomb as I'd suspected?
Was it really an accident, a terrorist activity or was it a government conspiracy?

As far I can remember, the ZTE controversy was at its peak of notoriety, days before the explosion transpired.

Was the incident used as an instrument of diversion? We can only come up with a theory, but as much as we really knew the reason why such an explosion came to pass.....