.Putin contacts cross-border assault in Kursk area a 'justification' The Washington PostRussia claims Ukrainian troops crossed right into its own area and introduced 'extensive assault' CNNHow deep in to Russian territory has Ukraine's shock August incursion gotten to? MeduzaUkraine Launches Rare Cross-Border Ground Assault Into Russia The The Big Apple TimesRussia: Condition of urgent in Kursk among incursion DW (English).