I’m surprised at how little we’re hearing about any covert actions by either side, since there are significant numbers of Ukrainians in Russia and vice versa. When the war started, I expected that there would be fairly frequent acts of sabotage in both countries. There is periodically news of saboteurs caught in Ukraine before accomplishing anything dramatic, and I don’t follow Russian news closely enough to know whether they have made credible claims of catching Ukrainian saboteurs. The truck bomb on the Kerch bridge is the major exception.