.Putin phones cross-border assault in Kursk area a 'provocation' The Washington PostRussia claims Ukrainian troops intercrossed in to its area as well as released 'extensive attack' CNNHow deep in to Russian region possesses Ukraine's surprise August incursion arrived at? MeduzaUkraine Launches Rare Cross-Border Ground Attack Into Russia The The Big Apple TimesRussia: State of emergency in Kursk amid attack DW (English).