.Putin contacts cross-border strike in Kursk region a 'justification' The Washington PostRussia states Ukrainian troops crossed into its own region and also launched 'gigantic attack' CNNHow deep in to Russian territory possesses Ukraine's surprise August incursion gotten to? MeduzaUkraine Launches Rare Cross-Border Ground Assault Into Russia The The Big Apple TimesRussia: State of emergency situation in Kursk among incursion DW (English).