Baloch Seperatists Seem The Most Likely Suspects.

https://english.news.cn/asiapacific/20230929/d2e8639794b140f2977ae334b8f8246d/c.html

The question is always whether they're acting autonomously or on the CIA's behalf. The anti-Shia sectarian element does seem unusual for them.

Of course the Asia-Pacific region, including Afghanistan and Pakistan, is the massive area I need to catch up on.