What are you talking about? They launched dosens (hundreds since Feb 24th) of Kalibr missiles, all the way from Caspian and Black seas.
This time it was Polish civilians and the lie won't fly.
"Three U.S. officials said preliminary assessments suggested the missile was fired by Ukrainian forces at an incoming Russian missile" [0]
[0] https://apnews.com/article/g-20-summit-nato-biden-andrzej-du...
I'm glad that it (probably?) didn't turn out to be from Russia, though!