.Putin contacts cross-border strike in Kursk region a 'provocation' The Washington PostRussia points out Ukrainian troops intercrossed in to its area and also launched 'massive assault' CNNHow deep into Russian territory has Ukraine's shock August attack reached? MeduzaUkraine Launches Rare Cross-Border Ground Assault Into Russia The New York City TimesRussia: Condition of emergency in Kursk in the middle of incursion DW (English).