https://www.bbc.com/news/world-europe-68941220

State department officials said #Russia used the choking agent #chloropicrin to win "battlefield gains" over #Ukraine.

The allegations, which US officials said were not an "isolated" incident, would contravene the #ChemicalWeapons Convention (CWC), which Russia signed.

The #Kremlin rejected the accusations, calling them "baseless".