Igor Anatolyevich Kirillov was a Russian lieutenant general. He was the head of the Chemical, Biological, and Nuclear defense troops of the Russian Armed Forces until his assassination in 2024 by Ukrainian security forces. Kirillov was the highest-ranking Russian military official to be killed outside the front lines since Russia's February 2022 invasion of Ukraine. Kirillov had facilitated the use of chloropicrin in Ukraine, a war crime per the Chemical Weapons Convention.