I was misremembering a bit, it was about exactly one year ago. No English sources for the case I saw that I'm aware of.
A rather interesting and Tom Clancy part of this whatever op is that, someone did a bit of digging and discovered that all instances of this across regions and nations use the exact same model of that black air circulator fan that aren't exactly sold everywhere. So as janky as they look, it's clearly a disciplined military style operation by some organized group than just local gangs buying parts and improvising as they go.
A rather interesting and Tom Clancy part of this whatever op is that, someone did a bit of digging and discovered that all instances of this across regions and nations use the exact same model of that black air circulator fan that aren't exactly sold everywhere. So as janky as they look, it's clearly a disciplined military style operation by some organized group than just local gangs buying parts and improvising as they go.
1: https://www.itmedia.co.jp/news/articles/2504/15/news133.html