What happened? The russian occupiers probably used containers with a poisonous substance against the Ukrainian defenders.
Source. The statement of the Operational Command South.
Details. “With the use of an unmanned aerial vehicle, containers with a poisonous substance, presumably a K-51 chloropicrin grenade, were dropped on our combat positions. The combat medics worked accurately, there were no casualties or critical conditions,” the command informed.
Chloropicrin was used as early as the First World War as a combat poison, the vapours of which have a strong lachrymatory effect: in high concentrations – suffocating effect. The OPCW Convention prohibits the military use of the substance.