I don't put anything past this leadership in N. Korea.
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I agree.
Kim Jong il scripted and directed the huge blast which took a KAL airliner out of the sky over the Andaman Sea--killing over 100 aboard, a bomb placed there by two of his agents, one later captured.
Kim Jong il scripted and directed the blast at Seoul's Kimpo Airport a few months before the Seoul Olympics in 1988, seriously injuring people, in order to scare off the World from Seoul because he was 'jealous' of them being in the spotlight and he could not co-host.
This man is fully capable of engineering a huge blast of some sorts in a populated area in South Korea or Japan, killing civilians, and would think nothing of it.