Russian invasion of Ukraine
At least one Russian is under arrest (as of 2023) in an EU-country, and waiting for the court system to say if he will be extradited (or sent) to Ukraine, because of charges of war crimes. (In 2022, the Rusich Group and its commanders Milchakov and Yan Petrovsky were included in the US sanctions list for their "special cruelty" in the battles in the Kharkiv oblast.)