Apparently “perpetrated” by civilians living under Russian occupation.
After World War II a group of Jewish Partisans attempted to poison the civilian water system in Nuremberg (they were thwarted) and SS soldiers in an American POW camp. They were more successful there.
https://en.wikipedia.org/wiki/Nakam#Plan_B_(mass_poisoning_of_SS_prisoners)
Recently watched a movie about this.
I am so tired of you sleazebags pretending this is not an illegal war being conducted by the USA against Russia and pretending it is a Ukraine war.