.Putin contacts cross-border attack in Kursk location a 'provocation' The Washington PostRussia says Ukrainian troops intercrossed into its area as well as launched 'substantial assault' CNNHow deep in to Russian territory has Ukraine's surprise August incursion hit? MeduzaUkraine Launches Rare Cross-Border Ground Attack Into Russia The New York TimesRussia: Condition of emergency situation in Kursk surrounded by incursion DW (English).