South Korea launched the domestically produced, Hyunmoo-2 missiles. On this occasion, one of the missiles malfunctioned and landed on one of its own air force bases.
Hit their own base (trying) to own the tankies. Kim Jong-Un must have telekinesis powers now in addition to necromancy.
...yeah, the moment the earliest reports of explosions in South Korea came in the thought "Did those morons actually shoot themselves? No, they can't be that stupid... They can't be... But there's no other explanation... Are they actually stupid?"