.Putin phones cross-border assault in Kursk region a 'provocation' The Washington PostRussia claims Ukrainian soldiers intercrossed in to its own area and also introduced 'large assault' CNNHow deep into Russian region has Ukraine's surprise August attack gotten to? MeduzaUkraine Launches Rare Cross-Border Ground Attack Into Russia The New York City TimesRussia: State of emergency in Kursk amidst incursion DW (English).