Sources from Ukraine’s SBU security service said it was behind the blast and described it as a special operation against a legitimate target.
Kirillov and an aide were killed by explosives planted in an electric scooter, according to Russian officials, which was blown up as he left the building he lived in on Ryazansky Prospekt in south-eastern Moscow.
On the eve of his killing, Ukraine's SBU declared that he had been named in absentia in a criminal case for the "mass use" of prohibited chemical weapons on the eastern and southern fronts in Ukraine.
It cited "more than 4,800 cases of the enemy using chemical munitions" on Ukrainian territory since the start of the full-scale Russian invasion in February 2022, the BBC said.
