Ukraine strikes Russian apartment building killing 15 people, officials say ABC NewsRussia Suffers One of Its Most Deadly Attacks of the War The Daily BeastWar in Ukraine: Drone Strike Triggers Fire at Russian Oil Refinery BloombergUkraine war briefing: 15 killed in Belgorod after Ukrainian missile shot down, officials say The GuardianFive killed in Ukrainian strikes on Russian border regions, Donetsk, officials say Reuters