.Putin phones cross-border strike in Kursk location a 'provocation' The Washington PostRussia says Ukrainian troops crossed into its region as well as introduced 'massive assault' CNNHow deep in to Russian region possesses Ukraine's shock August attack reached? MeduzaUkraine Launches Rare Cross-Border Ground Assault Into Russia The New York TimesRussia: State of emergency in Kursk surrounded by attack DW (English).