Unlikely given that disposable cutout agents or useful idiots are used.
https://en.wikipedia.org/wiki/Unrestricted_Warfare or hybrid warfare is designed to avoid full military action. But the tit for tat escalation in kind can lead to real war.
It would be interesting to see graphs of how similarly "unprovable" sabotage actions have developed in Russia over the past few years. I doubt we'd ever see accurate reporting out of Russia, but it seems like an obvious thing to do for both Ukrainian intelligence and also for the wider West. It's also be likely to be underreported on because neither the perpetrator nor the victim gains all that much from reporting these kind of things.
Sounds very like what happened in London a couple of years back:
https://www.bbc.co.uk/news/articles/c04g5x1wq5vo