.Putin calls cross-border attack in Kursk area a 'justification' The Washington PostRussia says Ukrainian troops crossed right into its territory and also introduced 'gigantic strike' CNNHow deep in to Russian territory possesses Ukraine's unpleasant surprise August attack hit? MeduzaUkraine Launches Rare Cross-Border Ground Assault Into Russia The New York TimesRussia: State of urgent in Kursk in the middle of attack DW (English).