.Putin calls cross-border attack in Kursk area a 'justification' The Washington PostRussia points out Ukrainian troops intercrossed into its own region and released 'huge attack' CNNHow deep in to Russian territory has Ukraine's shock August incursion arrived at? MeduzaUkraine Launches Rare Cross-Border Ground Assault Into Russia The Nyc TimesRussia: State of emergency in Kursk among attack DW (English).