Ukraine picked the "My troops are merely passing by" diplomacy option.
This never happened when Shoigu was still defense minister. This Gerasimov fellow should watch out because in Russia, if a door closes a window opens.
Not promoting it or anything but how in the first point. Get ahold of polonium? Second how do they pick the person to take him out? And why isn't the target aware he is sought after? Multiple questions little answers.
If he ignored them, good, if he didn't - even better
Ukraine picked the "My troops are merely passing by" diplomacy option.