.Putin contacts cross-border attack in Kursk region a 'justification' The Washington PostRussia states Ukrainian soldiers intercrossed right into its region as well as released 'massive strike' CNNHow deep right into Russian region has Ukraine's surprise August attack hit? MeduzaUkraine Launches Rare Cross-Border Ground Attack Into Russia The New York City TimesRussia: State of emergency in Kursk amid incursion DW (English).