Potential tactics would target senior officials and oligarchs.
https://www.radiosvoboda.org/a/news-rosija-krym-potiah-kryminalna-sprava/30343823.html
https://www.levada.ru/2019/12/25/vozmozhnye-rezultaty-vyborov-v-gosdumu-2/
https://ru.krymr.com/a/putin-i-parovoz-ktymsky-most/30340478.html
Официальный Киев не признает попытки Кремля легитимизировать аннексию Крыма и протестует против визита Вл...
https://ru.krymr.com/a/ukraina-protestuet-protiv-poezdov-v-anneksirovanniy-krym/30344104.html
SOFIA, Bulgaria -- The Russian assassin used an alias, Sergei Fedotov, and slipped into Bulgaria unnoticed, checking into a hotel in Sofia near the office of a local arms manufacturer who had been selling ammunition to Ukraine.He led a team of three men.Within days, one man sneaked into a locked parking
https://news.yahoo.com/poisoning-bulgaria-exposed-russian-assassins-133100185.html
https://www.inopressa.ru/article/23Dec2019/nytimes/gebrev.html
https://www.nytimes.com/2019/12/22/world/europe/bulgaria-russia-assassination-squad.html
https://lenta.ru/articles/2019/12/21/bunt/
https://www.kommersant.ru/doc/4204644