Ukrainian agents, working in cooperation with anti-Putin partisans, took out the criminal General Igor Kirillov, and his assistant at his Moscow apartment. Got him with a planted bomb. Kirillov was on "administrative leave" after he was found to have used illegal chemical weapons in Ukraine. Such weapons are against the Geneva Convention. Not satisfied with Putin's handling of the matter, Kirillov still drawing his salary and being able to come and go as he pleased, the Ukrans took care of it themselves.
Ukraine complained loudly, appealing to the world to step up when the Russians, namely General Kirillov, was murdering civilians, and killing Ukran soldiers too, with the use of chemical weapons. Incredibly "the world" refused to believe it. Brushed it off as "fake news," mere anti-Russian propaganda. The UN refused to investigate it even when the Ukrainians invited the UN to visit a town which had been hit with a chemical weapon. Finally, it was the Germans, an investigative TV news team, joined by members of the German army, who deal with such weapons, who brought the matter to the forefront. The UN then passed some resolution condemning the use of chemical weapons by any nation, without calling out Russia in particular. The Kremlin pulled General Kirillov off the line, removing him from active command of his division, and later Putin ordered the administrative leave, with pay.
In the wake of this justified "take out," which pro-Putin sources condemn as an "act of murder," the Ukrainians are pointing out other incidents of the Russians using illegal chemical weapons, elsewhere, beyond the area where Kirillov's division was operating. Meaning there are more guilty Russian officers still out there.
Ukran Special Forces, who orchestrated the "hit," point out they had been very cautious to avoid collateral damage, i.e. other casualties, and waited until Kirillov, and his assistant, also guilty of war crimes, were isolated. A bomb was placed in a motor scooter which an agent left parked near the door of Kirillov's Moscow Apartment. It was set off remotely. There was minimal damage done to the apartment building.