Cautious and I do mean cautious.
RUMINT
There are unconfirmed reports that Russia may have used a chemical weapon against Ukrainian military and civilians in the city of Mariupol.
The general in charge of the phase 2 Russian operation used chemicals in Syria.
Meanwhile in Russian state media: talk of using chemical weapons in Ukraine. And that Mariupol would fall today.
Sweeping the nets for better confirmation, just don’t take it as fact yet.
looks like they are upping the game, but it could be Ukraine, since they have also been playing dirty.