As of now, the Ukrainian intelligence sees no sign of Russians massively importing projectiles with poisonous substances to the territory of Ukraine.
Source: Ukrinform with reference to Oleksii Hromov, Deputy Head of the Main Operational Directorate of the General Staff of the Armed Forces of Ukraine
Quote: "They [Russians - ed.] definitely have chemical weapons, they have radiation, chemical and biological defence troops in Ukraine that can use these weapons. But for now, the intelligence cannot confirm that Russians are massively transporting projectiles containing poisonous substances.
There may be targeted use of chemical weapons, for instance, irritants that affect organs of vision and respiration may be used. Russians made such attempts. Every soldier in our units has means of protection of the respiratory system and skin."
The American media outlet Politico, with reference to six informed sources, reported that the USA does not exclude that Russia may use chemical weapons in Ukraine if it continues to lose in the battlefield.