.Putin contacts cross-border assault in Kursk area a 'justification' The Washington PostRussia states Ukrainian soldiers crossed in to its area and also introduced 'enormous strike' CNNHow deep into Russian area possesses Ukraine's surprise August attack hit? MeduzaUkraine Launches Rare Cross-Border Ground Attack Into Russia The Nyc TimesRussia: State of unexpected emergency in Kursk among incursion DW (English).