Earlier in the day, the Investigative Committee said that the investigation into the December terrorist attack against Akhmadzhon Kurbonov, Robert Safaryan, Batukhan Tochiyev, and Ramazan Padiev, which resulted in the death of Kirillov, was completed.
"Investigators from the central office have established that the crime was meticulously and extensively planned in Ukraine. In the fall of 2024, the organizers planned the transport of components of an improvised explosive device, disguised as household items, from Poland to Russia and arranged for their delivery to Safaryan. He stored these items at his residence and, after receiving instructions from the organizers, handed them over to Kurbonov, the perpetrator of the terrorist attack," the committee said in a statement.
Kirillov and his aide were killed in Moscow in 2024 by a bomb hidden in an electric scooter. An official from Ukraine's security service, the SBU, confirmed to The New York Times that Ukraine was responsible for the assassination.