.Putin phones cross-border strike in Kursk location a 'provocation' The Washington PostRussia mentions Ukrainian soldiers crossed in to its area and introduced 'massive attack' CNNHow deep right into Russian area has Ukraine's unpleasant surprise August attack hit? MeduzaUkraine Launches Rare Cross-Border Ground Attack Into Russia The New York City TimesRussia: Condition of urgent in Kursk in the middle of attack DW (English).