Ukraine claims it's behind Moscow blast that killed head of Russia's nuclear defense forces

The head of Russia's Nuclear, Biological, and Chemical Defense Forces, Lt. General Igor Kirillov, was killed along with his deputy in an explosion in Moscow, Russian investigators say. Ukraine clams it was behind the blast.

Ukraine claims it's behind Moscow blast that killed head of Russia's nuclear defense forces
The head of Russia's Nuclear, Biological, and Chemical Defense Forces, Lt. General Igor Kirillov, was killed along with his deputy in an explosion in Moscow, Russian investigators say. Ukraine clams it was behind the blast.