.Putin calls cross-border assault in Kursk area a 'provocation' The Washington PostRussia says Ukrainian soldiers intercrossed in to its own territory and introduced 'enormous assault' CNNHow deep into Russian area has Ukraine's surprise August incursion gotten to? MeduzaUkraine Launches Rare Cross-Border Ground Assault Into Russia The The Big Apple TimesRussia: State of emergency situation in Kursk in the middle of incursion DW (English).