.Putin calls cross-border strike in Kursk region a 'provocation' The Washington PostRussia says Ukrainian troops intercrossed in to its territory as well as launched 'gigantic attack' CNNHow deep into Russian territory possesses Ukraine's surprise August attack arrived at? MeduzaUkraine Launches Rare Cross-Border Ground Attack Into Russia The Nyc TimesRussia: Condition of unexpected emergency in Kursk amidst attack DW (English).