Dozens of civilians have been killed and hundreds wounded after Russian rocket artillery opened fire on Ukraine's second-largest city, authorities in Kiev have said. Kharkiv, which has witnessed some of the heaviest fighting of the war so far, was hit by rockets fired from Russian positions on Monday - with video showing an area around a major shopping centre blanketed by explosions. Graphic images and video then revealed streets littered with the bodies of dead and badly wounded civilians, with other images showing spent shell cartridges laying in the streets and having fallen through apartment roofs. It marks one of...