.Putin phones cross-border assault in Kursk region a 'provocation' The Washington PostRussia states Ukrainian soldiers intercrossed in to its region and also released 'substantial attack' CNNHow deep right into Russian region has Ukraine's surprise August attack gotten to? MeduzaUkraine Launches Rare Cross-Border Ground Assault Into Russia The New York City TimesRussia: State of emergency in Kursk surrounded by attack DW (English).