It's a tired tale by now but stirring shit (whatever shit wherever it happens) is literally part of the Russian playbook [1]
[1] https://en.wikipedia.org/wiki/Foundations_of_Geopolitics
[1] https://en.wikipedia.org/wiki/Foundations_of_Geopolitics
https://www.bloomberg.com/news/articles/2022-02-07/biden-sai...
Do you have a source? Seems like the US IC is claiming a pro Ukrainian group did it.
https://www.reuters.com/world/europe/us-intelligence-suggest...