.Putin contacts cross-border assault in Kursk region a 'provocation' The Washington PostRussia says Ukrainian soldiers intercrossed in to its own area as well as introduced 'extensive attack' CNNHow deep into Russian region has Ukraine's shock August attack gotten to? MeduzaUkraine Launches Rare Cross-Border Ground Assault Into Russia The Nyc TimesRussia: State of emergency in Kursk among attack DW (English).