The operations are international and are carried out not only by squirrels, weasels (some say martens) are also involved. One of those (unlikely unintentionally) had shutdown the Large Hadron Collider at CERN in 2016:

1. https://www.bbc.com/news/world-europe-36173247

It’s unclear whose side the mustelidae are on. Some have been known to collaborate with the physicists.

https://www.atlasobscura.com/articles/felicia-ferret-particl...