Earlier quoted context omitted.
I suppose you're right. Just strange, things have been so quiet for so long. The US is leaving Afghanistan, Iraq - apart from some sectarian violence has been quiet, and now this? My mind just goes back to NK. With the heightened tensions and such... Seems too convenient.
It's not productive to speculate as to who is responsible. It could be anyone, or it could be a complete accident (gas leak?). Pointing blame before even the most basic facts are known is really, really poor.
Nobody is pointing "blame." But we can discuss who the likely suspects would be.