The man who has been arrested is, according to the Russian security service FSB, a 29-year-old Uzbek and he is said to have been recruited by Ukraine's security service (SBU). In exchange, the man is alleged to have been promised $100,000 (approximately 1.1 million Swedish kronor) and a trip to settle in Europe, according to information presented by the state-controlled news agency Tass.
According to FSB, the suspect risks being sentenced to up to life imprisonment.
According to source information, two people have been arrested, reports the Russian newspaper Kommersant.
Kirillov and his colleagues were killed in an explosion near the entrance to an apartment building in Moscow. The explosive device had been placed in an electric bicycle and was remotely detonated, according to Russian media reports.
The suspect is said, according to Russian accounts, to have rented a car to monitor the location and set up a camera that transmitted live images. When Igor Kirillov was seen leaving the building, the bomb was then detonated.
A Ukrainian security service (SBU) official stated on Tuesday that the country was behind the deadly attack.
Kirillov was a war criminal and a completely legitimate target, since he gave orders to use prohibited chemical weapons against the Ukrainian military, he said then.
The information has not been verified by independent sources.
