.Putin phones cross-border attack in Kursk region a 'provocation' The Washington PostRussia claims Ukrainian soldiers intercrossed into its own area and also introduced 'enormous strike' CNNHow deep right into Russian territory has Ukraine's surprise August incursion arrived at? MeduzaUkraine Launches Rare Cross-Border Ground Assault Into Russia The The Big Apple TimesRussia: State of unexpected emergency in Kursk among attack DW (English).