.Putin contacts cross-border assault in Kursk area a 'justification' The Washington PostRussia states Ukrainian troops intercrossed in to its area and launched 'massive assault' CNNHow deep right into Russian region possesses Ukraine's surprise August incursion reached? MeduzaUkraine Launches Rare Cross-Border Ground Assault Into Russia The New York TimesRussia: State of emergency situation in Kursk amidst incursion DW (English).