Ukraine accused Russia [...] of using toxic chemicals in more than 200 attacks on the battlefield in January alone, a sharp increase in what it said were recorded instances of their use by Russian forces since they invaded two years ago.
CS gas [...] is banned on the battlefield by the international Chemical Weapons Convention which states in Article 1: "Each State Party undertakes not to use riot control agents as a method of warfare."
[...] The Ukrainian general staff said: "815 cases of the use of ammunition loaded with toxic chemicals by the Russian Federation were recorded. Of these, only in January 2024 – 229 cases."