Ukraine and Russia have escalated their shadow war of espionage, sabotage, and assassinations, with both countries claiming a growing list of captured agents, intercepted plots, and cross-border attacks.

Ukrainian Security Service says two Russian FSB agents suspected of killing Colonel Ivan Voronych on July 10 have been "neutralized" in Kyiv Oblast.

Ukraine’s Security Service said Sunday they had killed Russian special service agents suspected of gunning down a fellow officer in Kyiv earlier this week, saying it believed Russia’s Federal Security Service was responsible.