.Putin phones cross-border attack in Kursk region a 'justification' The Washington PostRussia states Ukrainian troops intercrossed in to its territory and also launched 'enormous strike' CNNHow deep into Russian territory possesses Ukraine's unpleasant surprise August attack hit? MeduzaUkraine Launches Rare Cross-Border Ground Assault Into Russia The New York TimesRussia: Condition of emergency in Kursk surrounded by incursion DW (English).