A man, suspected of involvement in the killing of Lt. Gen. Igor Kirillov, the head of Russia's Radiation, Biological and Chemical Defense Forces, and his assistant Ilya Polikarpov, is escorted to ...

FILE - Maj. Gen. Igor Kirillov, the chief of the Russian military's radiation, chemical and biological protection unit, attends a briefing in Kubinka Patriot park, outside Moscow, Russia, on June ...

Who was Lieutenant General Igor Kirillov? Born on July 13, 1970, 54-year-old Kirillov was the head of the Russian Armed Forces' radiation, chemical, and biological defense troops (RKhBZ).

Two Dutch intelligence agencies said on Friday that Russia is increasing its use of prohibited chemical weapons ...

The general, Igor Kirillov, was killed, along with an aide, after an explosive device seemingly planted within a scooter was detonated.

Ukrainian media posted what appeared to be security camera footage showing a man walking through a parking lot with bags ...

Igor Kirillov was killed by a bomb planted in a scooter in Moscow. A Ukrainian Security Service source told BI that Ukraine was behind the attack.

As head of Russia's Radiation, Chemical and Biological Protection troops, Igor Kirillov was accused by the West of overseeing the use of chemical weapons on the battlefield in Ukraine.

As head of Russia's Radiation, Chemical and Biological Protection troops, Igor Kirillov - who has died in an explosion in Moscow - was accused by the West of overseeing the use of chemical weapons ...

Kirillov was the head of Russia's radiation, chemical and biological protection troops. Sources told ABC News that the Security Service of Ukraine was behind the killing.

What happened? Lt. Gen. Igor Kirillov was killed Tuesday morning by a bomb hidden on an electric scooter parked near the entrance of his apartment block in southeastern Moscow as he left for his ...