Belgorod, in western Russia, hit hard as Ukraine retaliates for airstrikes
Washington Post
Most of Russia is insulated from the war, but a Ukrainian strike killed 25 people in Belgorod on Dec. 30, the largest civilian toll in Russia since its February 2022 invasion of Ukraine.
https://www.washingtonpost.com/world/2024/01/13/belgorod-russia-missile-strike-ukraine/