CNN
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A 29-year-old Uzbek citizen has been arrested for allegedly planting the bomb that killed the top Russian general and his assistant, the Russian Investigative Committee said on Wednesday.

Lt. Gen. Igor Kirillov, who led Russia’s radiological, biological and chemical defense forces, was killed by a remotely detonated bomb planted in an electric scooter outside a residential building about seven kilometers southeast of the Kremlin.

The explosion came a day after Ukrainian prosecutors convicted Kirillov in absentia over Russia’s use of banned chemical weapons during the invasion. A source familiar with the operation later told CNN that Ukraine’s security service SBU was behind the attack.

The Uzbek suspect was allegedly recruited by the special services of Ukraine and arrived in Moscow on their instructions, the committee said on its official Telegram channel.

“The detainee received a homemade explosive device and placed it on an electric scooter, which he parked at the entrance to the apartment building where Igor Kirillov lived,” the committee’s statement said.

To monitor Kirillov’s residence, the suspect rented a car and equipped it with a surveillance camera, the committee added.

“The footage from this camera was transmitted online to the organizers of the terrorist attack in the city of Dnipro. After a video signal was received that the soldiers were leaving the entrance, the explosive device was activated by them remotely,” the committee said, adding that “other people involved in organizing this crime are being identified.”

According to the committee, the detained Uzbek citizen was guaranteed a cash reward of $100,000 and residency in an unspecified European country.

Russian officials reacted angrily to the general’s death, promising punishment “without doubt and without mercy.”