.Putin contacts cross-border strike in Kursk area a 'provocation' The Washington PostRussia points out Ukrainian soldiers intercrossed into its area and introduced 'huge assault' CNNHow deep right into Russian territory has Ukraine's surprise August attack hit? MeduzaUkraine Launches Rare Cross-Border Ground Assault Into Russia The New York City TimesRussia: State of emergency in Kursk amid attack DW (English).