.Putin calls cross-border attack in Kursk location a 'provocation' The Washington PostRussia claims Ukrainian soldiers crossed in to its own territory and also launched 'extensive strike' CNNHow deep in to Russian area has Ukraine's shock August incursion reached? MeduzaUkraine Launches Rare Cross-Border Ground Assault Into Russia The New York City TimesRussia: Condition of urgent in Kursk among attack DW (English).