.Putin phones cross-border strike in Kursk area a 'justification' The Washington PostRussia states Ukrainian troops crossed in to its own territory as well as launched 'huge attack' CNNHow deep right into Russian territory has Ukraine's surprise August incursion gotten to? MeduzaUkraine Launches Rare Cross-Border Ground Assault Into Russia The New York City TimesRussia: State of emergency situation in Kursk among attack DW (English).