A bomb hidden in an electric scooter killed a senior Russian general in charge of nuclear protection forces in Moscow, Russia's investigative committee said.

Lieutenant General Igor Kirillov, who is chief of Russia's Nuclear, Biological and Chemical Protection Troops, was killed outside an apartment building on Ryazansky Prospekt, which starts road some 7 km (4 miles) southeast of the Kremlin.

"Igor Kirillov, the head of the radiation, chemical and biological protection forces of the armed forces of the Russian Federation, and his assistant were killed," the investigative committee said.

Photographs posted on Russian Telegram channels showed a shattered entrance to a building littered with rubble and two bodies lying in the blood-stained snow.

A criminal case has been opened.

Russia's radioactive, chemical and biological defence troops, known as RKhBZ, are special forces who operate under conditions of radioactive, chemical and biological contamination.

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