.Putin contacts cross-border assault in Kursk region a 'justification' The Washington PostRussia claims Ukrainian troops crossed in to its own area and launched 'gigantic strike' CNNHow deep right into Russian territory possesses Ukraine's shock August incursion hit? MeduzaUkraine Launches Rare Cross-Border Ground Attack Into Russia The New York City TimesRussia: Condition of urgent in Kursk amid incursion DW (English).