The Kyiv regime will pay dearly for the death of Chief of Russia’s Radiation, Chemical and Biological Protection Troops, Lieutenant General Igor Kirillov, Russian Security Council Deputy Chairman Dmitry Medvedev warned on Tuesday.

"Attempts to intimidate our nation, stop the Russian offensive or sow fear are doomed. Certain punishment awaits Banderite Nazis, including the top military and political leaders of a crumbling country," Medvedev’s office quoted the Russian politician as saying in a message of condolences to the family and friends of the fallen Russian general, TASS reported. 

Medvedev condemned the attack, saying, "This terrorist attack demonstrates the agony of the Banderite regime, which is struggling to justify its shaky existence in the eyes of its Western patrons and prolong the deadly hostilities while delivering cowardly attacks on civilians in cities and towns." 

The senior Russian security official described Kirillov as a true patriot of Russia. "Igor [Kirillov] was a military leader known for his unwavering devotion to his duties. I knew him as a dedicated professional and a reliable, honest, and responsible person," he added.

On the morning of Tuesday, an explosive device planted in a scooter exploded near the entrance of a residential building on Ryazansky Avenue in Moscow, investigators revealed. Kirillov, 54, and his aide were killed in the blast. The Russian Investigative Committee has classified the explosion as a terrorist attack, Committee Spokeswoman Svetlana Petrenko told TASS.