my speculation of how the bomb was planted based on the news, the bomb was planted through the exits of the delivery van, or the bomb came in the exits and not the entrance... it was planted near the LPG so massive explosion is expected, however luk yuen denied using lpg for cooking, what are they using then diesel? if so it is also explosive yet a fire should be brought about...

destabilization, possible martial law, or a decoy from the govt so the problem would be diverted