.Putin phones cross-border assault in Kursk region a 'provocation' The Washington PostRussia points out Ukrainian soldiers crossed in to its region as well as released 'substantial strike' CNNHow deep in to Russian region has Ukraine's surprise August incursion arrived at? MeduzaUkraine Launches Rare Cross-Border Ground Attack Into Russia The Nyc TimesRussia: Condition of urgent in Kursk amid incursion DW (English).