MOSCOW, Dec 18 (AP/UNB) — A Russian intelligence agency said Wednesday that it has detained a suspect in the killing of a senior general in Moscow.

The suspect was described as an Uzbek citizen recruited by Ukrainian intelligence services.

Russia’s Federal Security Service, or FSB, didn't name the suspect, but said he was born in 1995. According to a statement by the FSB, the suspect said himself that he was recruited by Ukrainian special services.

Lt. Gen. Igor Kirillov was killed Tuesday by a bomb hidden in a scooter outside his apartment building in Moscow, a day after Ukraine’s security service leveled criminal charges against him. A Ukrainian official said the service carried out the attack.

Kirillov was the chief of the military’s nuclear, biological and chemical protection forces. His assistant also died in the attack.

Kirillov, 54, was under sanctions from several countries, including the U.K. and Canada, for his actions in Moscow's military operation in Ukraine. On Monday, Ukraine’s Security Service, or SBU, opened a criminal investigation against him, accusing him of directing the use of banned chemical weapons.

Russia has denied using any chemical weapons in Ukraine and, in turn, has accused Kyiv of using toxic agents in combat.

Kirillov, who took his current job in 2017, was one of the most high-profile figures to level those accusations. He held numerous briefings to accuse the Ukrainian military of using toxic agents and planning to launch attacks with radioactive substances — claims that Ukraine and its Western allies rejected as propaganda.

The bomb used in Tuesday’s attack was triggered remotely, according to Russian news reports. Images from the scene showed shattered windows and scorched brickwork.

Russia’s top state investigative agency said it’s looking into Kirillov’s death as a case of terrorism, and officials in Moscow vowed to punish Ukraine.

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