US claim Russia using chemical choking agents in Ukraine

The US has accused Russia of deploying chemical weapons as a “method of warfare” in Ukraine, in violation of international laws banning their use.
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 Chemical Weapons Convention (CWC), which Russia signed.
The Kremlin has yet to comment, but has denied similar allegations in the past.
The Organisation for the Prohibition of Chemical Weapons (OPCW), a global watchdog that oversees implementation of the CWC, says a chemical weapon is a substance used to cause intentional death or harm through its toxic properties.