.Putin phones cross-border attack in Kursk region a 'provocation' The Washington PostRussia points out Ukrainian troops intercrossed in to its own region as well as introduced 'enormous attack' CNNHow deep right into Russian region possesses Ukraine's surprise August incursion hit? MeduzaUkraine Launches Rare Cross-Border Ground Assault Into Russia The New York TimesRussia: State of unexpected emergency in Kursk amid attack DW (English).