We had a poster on another thread who said there as a problem with gas at that residence ...
Citizens gas is "still investigating" but so far has stated there is no gas leak in their system in the area and no reports of problems. I don't know what "problem with gas" they could be refering to.
The house was for sale by owner. The blast and concussion was so enormous, people are wondering why no one would have smelled the gas in the neighborhood. Some have speculated that the basement could have filled completely with gas. But after that, the odor would have been prominent in the neighborhood as the gas (heavier than air) started seeping out of the house.
I've heard (fire fighter) one person suggest that if it was a gas leak that filled the basement that fast, it would have been one hell of a leak (not a joint seeping).
BTW - Andre Carson is an ignoramous that knows nothing. Nobody even takes him serious. He thought 911 was an inside job. If he says it's sunny out I'd take an umbrella.
If however the leak was leaking out of the basement into the ground or surrounding the basement in the ground, there may have been no perceptible odor.