Russian air attacks on major Ukrainian cities such as Kyiv, Dnipro and Kharkiv killed at least nine and wounded more than 60 early on Tuesday, authorities said, following days of warnings that Moscow was planning a major assault.Russia has targeted Ukraine’s power supply and infrastructure while Ukraine has stepped up attacks this year on Russian oil facilities in a war now more than four years old, sometimes causing casualties, but both deny targeting civilians.Five people were killed and 25...