Did Russia use chemical weapons?

Telegram channel ‘Azov – Mariupol’ transmitted a message about the use of chemical weapons by the Russian Armed Forces against civilians of Mariupol:

Attention!
About an hour ago, Russian occupation forces used a poisonous substance of unknown origin dropped from an enemy UAV against Ukrainian soldiers and civilians in the city of Mariupol.

The victims have respiratory failure, vestibulo-atactic syndrome.
The consequences of the use of an unknown substance are being clarified.

Vestibulo-atactic syndrome is dizziness, instability, loss of balance and noise in the head.

However, Russia does not have drones capable of carrying chemical weapons in sufficient quantities to successfully carry out an attack, and the available ones do not imply such use.

Attention! The information requires additional verification.

In case of confirmation of the use of chemical weapons in Mariupol, it is possible to intervene in the conflict of NATO countries. U.S. President Joe Biden warned Putin during his speech in Poland that the U.S. would intervene in the conflict.