Russia invades Ukraine: Why Vladimir Putin chose war
Small-arms fire and explosions were heard in Kyiv's northern district of Obolonsky, as what appeared to be an advance party of Russia's invasion force left a trail of destruction. Ukrainian officials also said on Friday that radiation levels had increased in the Chernobyl exclusion zone and warned that the capture of the plant by Russian soldiers could have "terrible consequences". There was also a raft of sanctions in the cultural and sporting worlds, with UEFA deciding that Paris will host this season's Champions League final instead of Saint Petersburg.
